Most Frequently Asked Artificial Intelligence Interview Questions in 2024

Artificial Intelligence Interview Questions:

Ever since we realized how Artificial Intelligence is positively impacting the market, nearly every large business is on the lookout for AI professionals to help them make their vision a reality. In this Artificial Intelligence Interview Questions blog, I have collected the most frequently asked questions by interviewers. These questions are collected after consulting with Machine Learning Course Expert.

In case you have attended any Artificial Intelligence interview in the recent past, do paste those interview questions in the comments section and we’ll answer them at the earliest. You can also comment below if you have any questions in your mind, which you might face in your Artificial Intelligence interview.

In this blog on Artificial Intelligence Interview Questions, I will be discussing the top Artificial Intelligence related questions asked in your interviews. So, for your better understanding I have divided this blog into the following 3 sections:

1. Artificial Intelligence Basic Level Interview Questions
2. Artificial Intelligence Intermediate Level Interview Questions
3. Artificial Intelligence Scenario Based Interview Question

Artificial Intelligence Basic Level Interview Questions

Q1. What is the difference between AI, Machine Learning and Deep Learning?

Artificial Intelligence vs Machine Learning vs Deep Learning – Artificial Intelligence Interview Questions – Edureka

Q2. What is Artificial Intelligence? Give an example of where AI is used on a daily basis.

Google’s Search Engine – Artificial Intelligence Interview Questions – Edureka

Google’s Search Engine
One of the most popular AI Applications is the google search engine. If you open up your chrome browser and start typing something, Google immediately provides recommendations for you to choose from. The logic behind the search engine is Artificial Intelligence.

AI uses predictive analytics, NLP and Machine Learning to recommend relevant searches to you. These recommendations are based on data that Google collects about you, such as your search history, location, age, etc. Thus, Google makes use of AI, to predict what you might be looking for.

ChatGPT Tutorial | ChatGPT Explained | What is ChatGPT ? | Edureka

Q3. What are the programming languages used for Artificial Intelligence?

Artificial Intelligence (AI) development involves a diverse range of tasks, from traditional machine learning to deep learning and natural language processing. As a result, several programming languages are commonly used in AI development, each offering its own strengths and features. Here are some of the main programming languages used for AI:

1. Python: Python is the most widely used programming language in AI development. It offers a vast ecosystem of libraries and frameworks, such as TensorFlow, PyTorch, scikit-learn, and Keras, making it highly suitable for machine learning, deep learning, and data analysis tasks. Python’s clear and concise syntax, as well as its extensive community support, contribute to its popularity in the AI community.

2. R: R is another popular language for AI and statistical computing. It is widely used for data analysis, data visualization, and machine learning tasks. R has a vast collection of packages specifically designed for statistical modeling and data manipulation, making it a favorite among statisticians and data scientists.

3. Java: Java is a versatile language that is often used in AI for building enterprise-level applications and integrating AI functionalities into existing systems. Libraries like Deeplearning4j enable Java developers to work with deep learning models.

4. C++: C++ is a powerful and efficient programming language often used for AI applications that require high performance, such as computer vision and robotics. It is commonly used in libraries like OpenCV, which focuses on computer vision tasks.

5. JavaScript: JavaScript is widely used for AI in the context of web development. With the advent of libraries like TensorFlow.js and Brain.js, JavaScript developers can now implement AI models directly in the browser or server-side.

6. Lisp: Lisp, particularly variants like Common Lisp and Clojure, has a historical significance in AI development. It was one of the early languages used for AI research due to its flexible and expressive syntax, making it well-suited for symbolic reasoning and manipulation.

7. Prolog: Prolog is a logic programming language commonly used for knowledge representation and rule-based reasoning tasks in AI, such as expert systems and expert systems.

8. Julia: Julia is a relatively new language that aims to bridge the gap between high-level dynamic languages like Python and high-performance languages like C++. It is gaining popularity in AI research and development due to its speed and ease of use.

9. Swift: Swift, the programming language developed by Apple, is increasingly used for AI applications on macOS and iOS platforms. It is particularly favored for developing AI-powered mobile applications.

Each of these programming languages has its own strengths and use cases in the field of AI. The choice of language often depends on the specific AI tasks, project requirements, existing expertise, and platform compatibility. Python and R, with their extensive libraries and frameworks, remain the dominant choices for most AI development.

Q3. What are the different types of AI?

• Reactive Machines AI: Based on present actions, it cannot use previous experiences to form current decisions and simultaneously update their memory.
  Example: Deep Blue
• Limited Memory AI: Used in self-driving cars. They detect the movement of vehicles around them constantly and add it to their memory.
• Theory of Mind AI: Advanced AI that has the ability to understand emotions, people and other things in the real world.
• Self Aware AI: AIs that posses human-like consciousness and reactions. Such machines have the ability to form self-driven actions.
• Artificial Narrow Intelligence (ANI): General purpose AI, used in building virtual assistants like Siri.
• Artificial General Intelligence (AGI): Also known as strong AI. An example is the Pillo robot that answers questions related to health.
• Artificial Superhuman Intelligence (ASI): AI that possesses the ability to do everything that a human can do and more. An example is the Alpha 2 which is the first humanoid ASI robot.

 Q5. What are the different platforms for Artificial Intelligence (AI) development?

Artificial Intelligence (AI) development is a rapidly evolving field, and there are several platforms and frameworks available to developers that make it easier to build AI-powered applications. Here are some of the most popular platforms for AI development:

1. TensorFlow: Developed by Google’s Brain Team, TensorFlow is an open-source machine learning library widely used for deep learning tasks. It provides a flexible ecosystem for building and training various AI models, including neural networks.
2. PyTorch: Developed by Facebook’s AI Research lab (FAIR), PyTorch is an open-source deep learning framework that has gained significant popularity among researchers and developers. It is known for its dynamic computation graph and ease of use.
3. Scikit-learn: Scikit-learn is a popular open-source library for traditional machine learning algorithms. It provides a wide range of tools for data preprocessing, feature selection, and model training for tasks like classification, regression, clustering, and more.
4. Keras: Keras is an easy-to-use and high-level neural networks API written in Python. It acts as a front-end to deep learning libraries like TensorFlow and Theano, allowing users to quickly build and experiment with neural network models.
5. Microsoft Azure ML: Azure ML is a cloud-based platform provided by Microsoft for building, training, and deploying machine learning models. It offers a range of services and tools to support AI development.
6. IBM Watson: IBM Watson is a suite of AI services and tools provided by IBM. It offers services for natural language processing, image recognition, speech-to-text, and more, allowing developers to integrate AI capabilities into their applications.
7. Amazon AWS AI Services: Amazon Web Services (AWS) provides a variety of AI services, including Amazon Lex for chatbots, Amazon Polly for text-to-speech, and Amazon Rekognition for image and video analysis.
8. Google Cloud AI Platform: Google Cloud offers a range of AI services through its AI Platform, including AI building blocks for vision, language, conversation, and structured data.
9. OpenAI: OpenAI is a research organization that provides access to some of its AI models and frameworks like GPT (Generative Pre-trained Transformer) for natural language understanding tasks.
10. Caffe: Caffe is a deep learning framework developed by Berkeley Vision and Learning Center (BVLC). It is particularly well-suited for computer vision tasks.

These platforms and frameworks offer various features and capabilities, making AI development more accessible and efficient for developers and researchers. Depending on the project requirements, developers can choose the platform that best fits their needs and expertise in AI development.

 Q4. Explain the different domains of Artificial Intelligence.

Domains Of AI – Artificial Intelligence Interview Questions – Edureka

• Machine Learning: It’s the science of getting computers to act by feeding them data so that they can learn a few tricks on their own, without being explicitly programmed to do so.
• Neural Networks: They are a set of algorithms and techniques, modeled in accordance with the human brain. Neural Networks are designed to solve complex and advanced machine learning problems.
• Robotics: Robotics is a subset of AI, which includes different branches and application of robots. These Robots are artificial agents acting in a real-world environment. An AI Robot works by manipulating the objects in it’s surrounding, by perceiving, moving and taking relevant actions.
• Expert Systems: An expert system is a computer system that mimics the decision-making ability of a human. It is a computer program that uses artificial intelligence (AI) technologies to simulate the judgment and behavior of a human or an organization that has expert knowledge and experience in a particular field.
• Fuzzy Logic Systems: Fuzzy logic is an approach to computing based on “degrees of truth” rather than the usual “true or false” (1 or 0) boolean logic on which the modern computer is based. Fuzzy logic Systems can take imprecise, distorted, noisy input information.
• Natural Language Processing: Natural Language Processing (NLP) refers to the Artificial Intelligence method that analyses natural human language to derive useful insights in order to solve problems.

Q5. How is Machine Learning related to Artificial Intelligence?

Artificial Intelligence is a technique that enables machines to mimic human behavior. Whereas, Machine Learning is a subset of Artificial Intelligence. It is the science of getting computers to act by feeding them data and letting them learn a few tricks on their own, without being explicitly programmed to do so.

Therefore Machine Learning is a technique used to implement Artificial Intelligence.

Artificial Intelligence vs Machine Learning – Artificial Intelligence Interview Questions – Edureka

Top 10 Trending Technologies to Learn in 2024 | Edureka

Q6. What are the different types of Machine Learning?

Types Of Machine Learning – Artificial Intelligence Interview Questions – Edureka

Q7. What is Q-Learning?

The Q-learning is a Reinforcement Learning algorithm in which an agent tries to learn the optimal policy from its past experiences with the environment. The past experiences of an agent are a sequence of state-action-rewards:

What Is Q-Learning? – Artificial Intelligence Interview Questions – Edureka

In the above state diagram, the Agent(a0) was in State (s0) and on performing an Action (a0), which resulted in receiving a Reward (r1) and thus being updated to State (s1).

Q8. What is Deep Learning?

Deep learning imitates the way our brain works i.e. it learns from experiences. It uses the concepts of neural networks to solve complex problems.

What Is Deep Learning? – Artificial Intelligence Interview Questions – Edureka

Any Deep neural network will consist of three types of layers:

• Input Layer: This layer receives all the inputs and forwards them to the hidden layer for analysis
• Hidden Layer: In this layer, various computations are carried out and the result is transferred to the output layer. There can be n number of hidden layers, depending on the problem you’re trying to solve.
• Output Layer: This layer is responsible for transferring information from the neural network to the outside world.

Q9. Explain how Deep Learning works.

Biological Neurons – Artificial Intelligence Interview Questions – Edureka

• Deep Learning is based on the basic unit of a brain called a brain cell or a neuron. Inspired from a neuron, an artificial neuron or a perceptron was developed.
• A biological neuron has dendrites which are used to receive inputs.
• Similarly, a perceptron receives multiple inputs, applies various transformations and functions and provides an output.
• Just like how our brain contains multiple connected neurons called neural network, we can also have a network of artificial neurons called perceptron’s to form a Deep neural network.

Deep Neural Network – Artificial Intelligence Interview Questions – Edureka

• An Artificial Neuron or a Perceptron models a neuron which has a set of inputs, each of which is assigned some specific weight. The neuron then computes some function on these weighted inputs and gives the output.

Q10. Explain the commonly used Artificial Neural Networks.

Feedforward Neural Network

• The simplest form of ANN, where the data or the input travels in one direction.
• The data passes through the input nodes and exit on the output nodes. This neural network may or may not have the hidden layers.

Convolutional Neural Network

• Here, input features are taken in batch wise like a filter. This will help the network to remember the images in parts and can compute the operations.
• Mainly used for signal and image processing

Recurrent Neural Network(RNN) – Long Short Term Memory

• Works on the principle of saving the output of a layer and feeding this back to the input to help in predicting the outcome of the layer.
• Here, you let the neural network to work on the front propagation and remember what information it needs for later use
• This way each neuron will remember some information it had in the previous time-step.

Autoencoders

• These are unsupervised learning models with an input layer, an output layer and one or more hidden layers connecting them.
• The output layer has the same number of units as the input layer. Its purpose is to reconstruct its own inputs.
• Typically for the purpose of dimensionality reduction and for learning generative models of data.

Q11. What are Bayesian Networks?

On the occurrence of an event, Bayesian Networks can be used to predict the likelihood that any one of several possible known causes was the contributing factor.

Bayesian Network – Artificial Intelligence Interview Questions – Edureka

For example, a Bayesian network could be used to study the relationship between diseases and symptoms. Given various symptoms, the Bayesian network is ideal for computing the probabilities of the presence of various diseases.

Q12. Explain the assessment that is used to test the intelligence of a machine.

In artificial intelligence (AI), a Turing Test is a method of inquiry for determining whether or not a computer is capable of thinking like a human being.

AI Turing Test – Artificial Intelligence Interview Questions – Edureka

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Artificial Intelligence Intermediate Level Interview Questions

Q1. How does Reinforcement Learning work? Explain with an example.

Generally, a Reinforcement Learning (RL) system is comprised of two main components:

1. An agent
2. An environment

Reinforcement Learning – Artificial Intelligence Interview Questions – Edureka

• The environment is the setting that the agent is acting on and the agent represents the RL algorithm.
• The RL process starts when the environment sends a state to the agent, which then based on its observations, takes an action in response to that state.
• In turn, the environment sends the next state and the respective reward back to the agent. The agent will update its knowledge with the reward returned by the environment to evaluate its last action.
• The loop continues until the environment sends a terminal state, which means the agent has accomplished all his tasks.

To understand this better, let’s suppose that our agent is learning to play counterstrike. The RL process can be broken down into the below steps:

Counter-Strike Example – Artificial Intelligence Interview Questions – Edureka

1. The RL Agent (Player1) collects state S⁰ from the environment (Counterstrike game)
2. Based on the state S⁰, the RL agent takes an action A⁰, (Action can be anything that causes a result i.e. if the agent moves left or right in the game). Initially, the action is random
3. The environment is now in a new state S¹ (new stage in the game)
4. The RL agent now gets a reward R¹ from the environment. This reward can be additional points or coins
5. This RL loop goes on until the RL agent is dead or reaches the destination, and it continuously outputs a sequence of state, action, and reward.

To learn more about Reinforcement Learning you can go through this video recorded by our Machine Learning experts.

Reinforcement Learning Tutorial | Reinforcement Learning Example Using Python | Edureka

Q2. Explain Markov’s decision process with an example.

• Set of actions, A
• Set of states, S
• Reward, R
• Policy, π
• Value, V

Markov’s Decision Process – Artificial Intelligence Interview Questions – Edureka

To briefly sum it up, the agent must take an action (A) to transition from the start state to the end state (S). While doing so, the agent receives rewards (R) for each action he takes. The series of actions taken by the agent, define the policy (π) and the rewards collected define the value (V). The main goal here is to maximize rewards by choosing the optimum policy.

To better understand the MDP, let’s solve the Shortest Path Problem using the MDP approach:

Shortest Path Problem – Artificial Intelligence Interview Questions – Edureka

Given the above representation, our goal here is to find the shortest path between ‘A’ and ‘D’. Each edge has a number linked with it, this denotes the cost to traverse that edge. Now, the task at hand is to traverse from point ‘A’ to ‘D’, with minimum possible cost.

In this problem,

• The set of states are denoted by nodes i.e. {A, B, C, D}
• The action is to traverse from one node to another {A -> B, C -> D}
• The reward is the cost represented by each edge
• The policy is the path taken to reach the destination

You start off at node A and take baby steps to your destination. Initially, only the next possible node is visible to you, thus you randomly start off and then learn as you traverse through the network. The main goal is to choose the path with the lowest cost.

Since this is a very simple problem, I will leave it for you to solve. Make sure you mention the answer in the comment section.

Q3. Explain reward maximization in Reinforcement Learning.

The RL agent works based on the theory of reward maximization. This is exactly why the RL agent must be trained in such a way that, he takes the best action so that the reward is maximum.

The collective rewards at a particular time with the respective action is written as:

Reward Maximization Equation – Artificial Intelligence Interview Questions – Edureka

The above equation is an ideal representation of rewards. Generally, things don’t work out like this while summing up the cumulative rewards.

Reward Maximization – Artificial Intelligence Interview Questions – Edureka

Let me explain this with a small game. In the figure you can see a fox, some meat and a tiger.

• Our RL agent is the fox and his end goal is to eat the maximum amount of meat before being eaten by the tiger.
• Since this fox is a clever fellow, he eats the meat that is closer to him, rather than the meat which is close to the tiger, because the closer he is to the tiger, the higher are his chances of getting killed.
• As a result, the rewards near the tiger, even if they are bigger meat chunks, will be discounted. This is done because of the uncertainty factor, that the tiger might kill the fox.

The next thing to understand is, how discounting of rewards work?
To do this, we define a discount rate called gamma. The value of gamma is between 0 and 1. The smaller the gamma, the larger the discount and vice versa.

So, our cumulative discounted rewards is:

Reward Maximization with Discount Equation – Artificial Intelligence Interview Questions – Edureka

Q4. What is exploitation and exploration trade-off?

An important concept in reinforcement learning is the exploration and exploitation trade-off.

Exploration, like the name suggests, is about exploring and capturing more information about an environment. On the other hand, exploitation is about using the already known exploited information to heighten the rewards.

Exploitation & Exploration – Artificial Intelligence Interview Questions – Edureka

• Consider the fox and tiger example, where the fox eats only the meat (small) chunks close to him but he doesn’t eat the bigger meat chunks at the top, even though the bigger meat chunks would get him more rewards.
• If the fox only focuses on the closest reward, he will never reach the big chunks of meat, this is called exploitation.
• But if the fox decides to explore a bit, it can find the bigger reward i.e. the big chunk of meat. This is exploration.

Q5. What is the difference between parametric & non-parametric models?

Parametric vs Non Parametric model – Artificial Intelligence Interview Questions – Edureka

Q6. What is the difference between Hyperparameters and model parameters?

Model Parameters vs Hyperparameters – Artificial Intelligence Interview Questions – Edureka

Q7. What are hyperparameters in Deep Neural Networks?

• Hyperparameters are variables that define the structure of the network. For example, variables such as the learning rate, define how the network is trained.
• They are used to define the number of hidden layers that must be present in a network.
• More hidden units can increase the accuracy of the network, whereas a lesser number of units may cause underfitting.

Q8. Explain the different algorithms used for hyperparameter optimization.

Grid Search
Grid search trains the network for every combination by using the two set of hyperparameters, learning rate and the number of layers. Then evaluates the model by using Cross Validation techniques.

Random Search
It randomly samples the search space and evaluates sets from a particular probability distribution. For example, instead of checking all 10,000 samples, randomly selected 100 parameters can be checked.

Bayesian Optimization
This includes fine-tuning the hyperparameters by enabling automated model tuning. The model used for approximating the objective function is called surrogate model (Gaussian Process). Bayesian Optimization uses Gaussian Process (GP) function to get posterior functions to make predictions based on prior functions.

Q9. How does data overfitting occur and how can it be fixed?

Cross-validation: The idea behind cross-validation is to split the training data in order to generate multiple mini train-test splits. These splits can then be used to tune your model.

More training data: Feeding more data to the machine learning model can help in better analysis and classification. However, this does not always work.

Remove features: Many times, the data set contains irrelevant features or predictor variables that are not needed for analysis. Such features only increase the complexity of the model, thus leading to possibilities of data overfitting. Therefore, such redundant variables must be removed.

Early stopping: A machine learning model is trained iteratively, this allows us to check how well each iteration of the model performs. But after a certain number of iterations, the model’s performance starts to saturate. Further training will result in overfitting, thus one must know where to stop the training. This can be achieved by a mechanism called early stopping.

Regularization: Regularization can be done in n number of ways, the method will depend on the type of learner you’re implementing. For example, pruning is performed on decision trees, the dropout technique is used on neural networks and parameter tuning can also be applied to solve overfitting issues.

Use Ensemble models: Ensemble learning is a technique that is used to create multiple Machine Learning models, which are then combined to produce more accurate results. This is one of the best ways to prevent overfitting. An example is Random Forest, it uses an ensemble of decision trees to make more accurate predictions and to avoid overfitting.

Q10. Mention a technique that helps to avoid overfitting in a neural network.

Dropout is a type of regularization technique used to avoid overfitting in a neural network. It is a technique where randomly selected neurons are dropped during training.

Dropout – Artificial Intelligence Interview Questions – Edureka

The Dropout value of a network must be chosen wisely. A value too low will result in a minimal effect and a value too high results in under-learning by the network.

Q11. What is the purpose of Deep Learning frameworks such as Keras, TensorFlow, and PyTorch?

• Keras is an open source neural network library written in Python. It is designed to enable fast experimentation with deep neural networks.
• TensorFlow is an open-source software library for dataflow programming. It is used for machine learning applications like neural networks.
• PyTorch is an open source machine learning library for Python, based on Torch. It is used for applications such as natural language processing.

Q12. Differentiate between NLP and Text mining.

Text Mining vs NLP – Artificial Intelligence Interview Questions – Edureka

Q13. What are the different components of NLP?

Components Of NLP – Artificial Intelligence Interview Questions – Edureka

Natural Language Understanding includes:

• Mapping input to useful representations
• Analyzing different aspects of the language

Natural Language Generation includes:

• Text Planning
• Sentence Planning
• Text Realization

Q14. What is Stemming & Lemmatization in NLP?

Stemming algorithms work by cutting off the end or the beginning of the word, taking into account a list of common prefixes and suffixes that can be found in an inflected word. This indiscriminate cutting can be successful on some occasions, but not always.

Stemming – Artificial Intelligence Interview Questions – Edureka

Lemmatization, on the other hand, takes into consideration the morphological analysis of the words. To do so, it is necessary to have detailed dictionaries which the algorithm can look through to link the form back to its lemma.

Q15. Explain Fuzzy Logic architecture.

Fuzzy Logic Architecture – Artificial Intelligence Interview Questions – Edureka

• Fuzzification Module − The system inputs are fed into the Fuzzifier, which transforms the inputs into fuzzy sets.
• Knowledge Base − It stores analytic measures such as IF-THEN rules provided by experts.
• Inference Engine − It simulates the human reasoning process by making fuzzy inference on the inputs and IF-THEN rules.
• Defuzzification Module − It transforms the fuzzy set obtained by the inference engine into a crisp value.

Q16. Explain the components of Expert Systems.

Expert Systems – Artificial Intelligence Interview Questions – Edureka

• Knowledge Base
  It contains domain-specific and high-quality knowledge.
• Inference Engine
  It acquires and manipulates the knowledge from the knowledge base to arrive at a particular solution.
• User Interface
  The user interface provides interaction between the user and the Expert System itself.

Q17. How is Computer Vision and AI related?

Computer Vision is a field of Artificial Intelligence that is used to obtain information from images or multi-dimensional data. Machine Learning algorithms such as K-means is used for Image Segmentation, Support Vector Machine is used for Image Classification and so on.

Computer Vision And AI – Artificial Intelligence Interview Questions – Edureka

Therefore Computer Vision makes use of AI technologies to solve complex problems such as Object Detection, Image Processing, etc.

Q18. Which is better for image classification? Supervised or unsupervised classification? Justify.

• In supervised classification, the images are manually fed and interpreted by the Machine Learning expert to create feature classes.
• In unsupervised classification, the Machine Learning software creates feature classes based on image pixel values.

Therefore, it is better to choose supervised classification for image classification in terms of accuracy.

Q19. Finite difference filters in image processing are very susceptible to noise. To cope up with this, which method can you use so that there would be minimal distortions by noise?

Image Smoothing is one of the best methods used for reducing noise by forcing pixels to be more like their neighbors, this reduces any distortions caused by contrasts.

Image Smoothing – Artificial Intelligence Interview Questions – Edureka

Q20. How many types of agents are there in Artificial intelligence?

In Artificial Intelligence (AI), agents are entities that perceive their environment, make decisions, and take actions to achieve specific goals. Based on their characteristics and behavior, AI agents can be categorized into several types. Here are some common types of agents:

1. Simple Reflex Agents: These agents make decisions based solely on the current percept (input) without considering the history or future consequences. They have a direct mapping of inputs to actions and are suitable for environments with low complexity.

2. Model-Based Reflex Agents: These agents maintain an internal model of the environment and use it to make decisions based on the current percept. They consider the current situation along with some history to select appropriate actions.

3. Goal-Based Agents: Goal-based agents have a goal or objective that they strive to achieve. They take actions that move them closer to their goal, considering both the current percept and past experiences.

4. Utility-Based Agents: Utility-based agents evaluate the desirability of different states and actions using a utility function. They aim to maximize their expected utility, which represents the agent’s preferences over outcomes.

5. Learning Agents: Learning agents can improve their performance over time by learning from their experiences. They use past data to update their knowledge and decision-making processes.

6. Knowledge-Based Agents: Knowledge-based agents possess a knowledge base, which includes facts about the environment and rules for reasoning. They use this knowledge to make informed decisions and solve problems.

7. Exploration vs. Exploitation Agents: These agents balance between exploring new options to gain more information and exploiting the current knowledge to achieve their goals efficiently.

8. Reactive vs. Deliberative Agents: Reactive agents act quickly based on immediate stimuli and do not maintain a long-term plan. Deliberative agents, on the other hand, analyze the current situation and plan their actions based on their goals.

9. Multi-Agent Systems: Multi-agent systems involve multiple agents that interact with each other to achieve individual or collective goals. These agents can be collaborative or competitive.

These are some of the fundamental types of agents in AI. In practice, agents can be more sophisticated, combining various characteristics and employing advanced techniques such as machine learning and deep learning to achieve their objectives in complex environments.

Q20. How is Game theory and AI related?

“In the context of artificial intelligence(AI) and deep learning systems, game theory is essential to enable some of the key capabilities required in multi-agent environments in which different AI programs need to interact or compete in order to accomplish a goal.”

Game Theory And AI – Artificial Intelligence Interview Questions – Edureka

Q21. What is the Minimax Algorithm? Explain the terminologies involved in a Minimax problem.

Minimax is a recursive algorithm used to select an optimal move for a player assuming that the other player is also playing optimally.

A game can be defined as a search problem with the following components:

• Game Tree: A tree structure containing all the possible moves.
• Initial state: The initial position of the board and showing whose move it is.
• Successor function: It defines the possible legal moves a player can make.
• Terminal state: It is the position of the board when the game ends.
• Utility function: It is a function which assigns a numeric value for the outcome of a game.

Q23. What do you understand by reward maximisation?

Reward maximization is a key concept in reinforcement learning. An AI agent tries to take actions that give it the most rewards from its environment over time. The agent learns from input, which comes in the form of rewards or punishments, and changes how it acts to do its jobs better. The goal is to make agents that are smart enough to learn from experience and make choices that help them reach their long-term goals as quickly as possible.

Q24. What is Overfitting?

Overfitting is a term used  to describe when a machine learning model becomes too specialized in learning from the training data. This happens when the model learns so much from the training data that it picks up noise and random changes instead of being able to adapt well to new, unknown data. An overfitted model does a great job with the training data, but it can’t make accurate guesses with new data, so its performance goes down.

Overfitting happens when a model is too hard to understand or has been taught for too many times. The model may remember the training data instead of learning the underlying patterns, which makes it bad at generalizing to new data.

Several AI methods, such as cross-validation, regularization, early stopping, and feature selection, are used to deal with overfitting. The goal is to find a good mix between how complicated the model is and how well it can be used to guess things about data that haven’t been seen yet.

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Artificial Intelligence Scenario Based Interview Question

Q1. Show the working of the Minimax algorithm using Tic-Tac-Toe Game.

There are two players involved in a game:

• MAX: This player tries to get the highest possible score
• MIN: MIN tries to get the lowest possible score

The following approach is taken for a Tic-Tac-Toe game using the Minimax algorithm:

Step 1: First, generate the entire game tree starting with the current position of the game all the way up to the terminal states.

Tic-Tac-Toe – Artificial Intelligence Interview Questions – Edureka

Step 2: Apply the utility function to get the utility values for all the terminal states.

Step 3: Determine the utilities of the higher nodes with the help of the utilities of the terminal nodes. For instance, in the diagram below, we have the utilities for the terminal states written in the squares.

Tic-Tac-Toe – Artificial Intelligence Interview Questions – Edureka

Let us calculate the utility for the left node(red) of the layer above the terminal:

MIN{3, 5, 10}, i.e. 3.
Therefore, the utility for the red node is 3.

Similarly, for the green node in the same layer:
MIN{2,2}, i.e. 2.

Tic-Tac-Toe – Artificial Intelligence Interview Questions – Edureka

Step 4: Calculate the utility values.

Step 5: Eventually, all the backed-up values reach to the root of the tree. At that point, MAX has to choose the highest value:
i.e. MAX{3,2} which is 3.

Therefore, the best opening move for MAX is the left node(or the red one).
To summarize,

Minimax Decision = MAX{MIN{3,5,10},MIN{2,2}}
= MAX{3,2}
= 3

Q2. Which method is used for optimizing a Minimax based game?

Alpha-beta Pruning
If we apply alpha-beta pruning to a standard minimax algorithm, it returns the same move as the standard one, but it removes all the nodes that are possibly not affecting the final decision.

Alpha-beta Pruning – Artificial Intelligence Interview Questions – Edureka

In this case,
Minimax Decision = MAX{MIN{3,5,10}, MIN{2,a,b}, MIN{2,7,3}}
= MAX{3,c,2}
= 3

Hint: (MIN{2,a,b} would certainly be less than or equal to 2, i.e., c<=2 and hence MAX{3,c,2} has to be 3.)

Q3. Which algorithm does Facebook use for face verification and how does it work?

Facebook uses DeepFace for face verification. It works on the face verification algorithm, structured by Artificial Intelligence (AI) techniques using neural network models.

Face Verification – Artificial Intelligence Interview Questions – Edureka

Here’s how face verification is done:

Input: Scan a wild form of photos with large complex data. This involves blurry images, images with high intensity and contrast.

Process: In modern face recognition, the process completes in 4 raw steps:

• Detect facial features
• Align and compare the features
• Represent the key patterns by using 3D graphs
• Classify the images based on similarity

Output: Final result is a face representation, which is derived from a 9-layer deep neural net

Training Data: More than 4 million facial images of more than 4000 people

Result: Facebook can detect whether the two images represent the same person or not

Q4. Explain the logic behind targeted marketing. How can Machine Learning help with this?

Target Marketing involves breaking a market into segments & concentrating it on a few key segments consisting of the customers whose needs and desires most closely match your product.

It is the key to attracting new business, increasing your sales, and growing the company.

The beauty of target marketing is that by aiming your marketing efforts at specific groups of consumers it makes the promotion, pricing, and distribution of your products and/or services easier and more cost-effective.

Targeted Marketing – Artificial Intelligence Interview Questions – Edureka

Machine Learning in targeted marketing:

• Text Analytics Systems: The applications for text analytics ranges from search applications, text classification, named entity recognition, to pattern search and replace applications.
• Clustering: With applications including customer segmentation, fast search, and visualization.
• Classification: Like decision trees and neural network classifiers, which can be used for text classification in marketing.
• Recommender Systems: And association rules which can be used to analyze your marketing data
• Market Basket Analysis: Market basket analysis explains the combinations of products that frequently
  co-occur in transactions.
  

Q5. How can AI be used in detecting fraud?

Fraud Detection Using AI – Artificial Intelligence Interview Questions – Edureka

The following approach is followed for detecting fraudulent activities:

Data Extraction: At this stage data is either collected through a survey or web scraping is performed. If you’re trying to detect credit card fraud, then information about the customer is collected. This includes transactional, shopping, personal details, etc.

Data Cleaning: At this stage, the redundant data must be removed. Any inconsistencies or missing values may lead to wrongful predictions, therefore such inconsistencies must be dealt with at this step.

Data Exploration & Analysis: This is the most important step in AI. Here you study the relationship between various predictor variables. For example, if a person has spent an unusual sum of money on a particular day, the chances of a fraudulent occurrence are very high. Such patterns must be detected and understood at this stage.

Building a Machine Learning model: There are many machine learning algorithms that can be used for detecting fraud. One such example is Logistic Regression, which is a classification algorithm. It can be used to classify events into 2 classes, namely, fraudulent and non-fraudulent.

Model Evaluation: Here, you basically test the efficiency of the machine learning model. If there is any room for improvement, then parameter tuning is performed. This improves the accuracy of the model.

Q6. A bank manager is given a data set containing records of 1000s of applicants who have applied for a loan. How can AI help the manager understand which loans he can approve? Explain.

This problem statement can be solved using the KNN algorithm, that will classify the applicant’s loan request into two classes:

1. Approved
2. Disapproved

K Nearest Neighbour is a Supervised Learning algorithm that classifies a new data point into the target class, depending on the features of its neighboring data points.

Bank Loan Approval Using AI – Artificial Intelligence Interview Questions – Edureka

The following steps can be carried out to predict whether a loan must be approved or not:

Data Extraction: At this stage data is either collected through a survey or web scraping is performed. Data about the customers must be collected. This includes their account balance, credit amount, age, occupation, loan records, etc. By using this data, we can predict whether or not to approve the loan of an applicant.

Data Cleaning: At this stage, the redundant variables must be removed. Some of these variables are not essential in predicting the loan of an applicant, for example, variables such as Telephone, Concurrent credits, etc. Such variables must be removed because they will only increase the complexity of the Machine Learning model.

Data Exploration & Analysis: This is the most important step in AI. Here you study the relationship between various predictor variables. For example, if a person has a history of unpaid loans, then the chances are that he might not get approval on his loan applicant. Such patterns must be detected and understood at this stage.

Building a Machine Learning model: There are n number of machine learning algorithms that can be used for predicting whether an applicant loan request is approved or not. One such example is the K-Nearest Neighbor, which is a classification and a regression algorithm. It will classify the applicant’s loan request into two classes, namely, Approved and Disapproved.

Model Evaluation: Here, you basically test the efficiency of the machine learning model. If there is any room for improvement, then parameter tuning is performed. This improves the accuracy of the model.

Q7. You’ve won a 2-million-dollar worth lottery’ we all get such spam messages. How can AI be used to detect and filter out such spam messages?

To understand spam detection, let’s take the example of Gmail. Gmail makes use of machine learning to filter out such spam messages from our inbox. These spam filters are used to classify emails into two classes, namely spam and non-spam emails.

Let’s understand how spam detection is done using machine learning:

Spam Detection Using AI – Artificial Intelligence Interview Questions – Edureka

• A machine learning process always begins with data collection. We all know the data Google has, is not obviously in paper files. They have data centers which maintain the customer’s data. Data such as email content, header, sender, etc are stored.
• This is followed by data cleaning. It is essential to get rid of unnecessary stop words and punctuations so that only the relevant data is used for creating a precise machine learning model. Therefore, in this stage stop words such as ‘the’, ‘and’, ‘a’ are removed. The text is formatted in such a way that it can be analyzed.
• After data cleaning comes data exploration and analysis. Many a time, certain words or phrases are frequently used in spam emails. Words like “lottery”, “earn”, “full-refund” indicate that the email is more likely to be a spam one. Such words and co-relations must be understood in this stage.
• After retrieving useful insights from data, a machine learning model is built. For classifying emails as either spam or non-spam you can use machine learning algorithms like Logistic Regression, Naïve Bayes, etc. The machine learning model is built using the training dataset. This data is used to train the model and make it learn by using past user email data.
• This stage is followed by model evaluation. In this phase, the model is tested using the testing data set, which is nothing but a new set of emails. After which the machine learning model is graded based on the accuracy with which it was able to classify the emails correctly.
• Once the evaluation is over, any further improvement in the model can be achieved by tuning a few variables/parameters. This stage is also known as parameter tuning. Here, you basically try to improve the efficiency of the machine learning model by tweaking a few parameters that you used to build the model.
• The last stage is deployment. Here the model is deployed to the end users, where it processes emails in real time and predicts whether the email is spam or non-spam.

Q8. Let’s say that you started an online shopping business and to grow your business, you want to forecast the sales for the upcoming months. How would you do this? Explain.

This can be done by studying the past data and building a model that shows how the sales have varied over a period of time. Sales Forecasting is one of the most common applications of AI. Linear Regression is one of the best Machine Learning algorithms used for forecasting sales.

When both sales and time have a linear relationship, it is best to use a simple linear regression model.

Linear Regression is a method to predict dependent variable (Y) based on values of independent variables (X). It can be used for the cases where we want to predict some continuous quantity.

• Dependent variable (Y):
  The response variable whose value needs to be predicted.
• Independent variable (X):
  The predictor variable used to predict the response variable.

In this example, the dependent variable ‘Y’ represents the sales and the independent variable ‘X’ represents the time period. Since the sales vary over a period of time, sales is the dependent variable.

Forecasting Sales Using AI – Artificial Intelligence Interview Questions – Edureka

The following equation is used to represent a linear regression model:

Y=𝒃𝟎+𝒃𝟏 𝒙+ⅇ

Linear Regression – Artificial Intelligence Interview Questions – Edureka

Here,

• Y = Dependent variable
• 𝒃𝟎 = Y-Intercept
• 𝒃𝟏 = Slope of the line
• x = Independent variable
• e = Error

Therefore, by using the Linear Regression model, wherein Y-axis represents the sales and X-axis denotes the time period, we can easily predict the sales for the upcoming months.

Q9. ‘Customers who bought this also bought this…’ we often see this when we shop on Amazon. What is the logic behind recommendation engines?

E-commerce websites like Amazon make use of Machine Learning to recommend products to their customers. The basic idea of this kind of recommendation comes from collaborative filtering. Collaborative filtering is the process of comparing users with similar shopping behaviors in order to recommend products to a new user with similar shopping behavior.

Recommendation System Using AI – Artificial Intelligence Interview Questions – Edureka

To better understand this, let’s look at an example. Let’s say a user A who is a sports enthusiast bought, pizza, pasta, and a coke. Now a couple of weeks later, another user B who rides a bicycle buys pizza and pasta. He does not buy the coke, but Amazon recommends a bottle of coke to user B since his shopping behaviors and his lifestyle is quite similar to user A. This is how collaborative filtering works.

Q10. What is market basket analysis and how can Artificial Intelligence be used to perform this?

Market basket analysis explains the combinations of products that frequently co-occur in transactions.

For example, if a person buys bread, there is a 40% chance that he might also buy butter. By understanding such correlations between items, companies can grow their businesses by giving relevant offers and discount codes on such items.

Market Basket Analysis is a well-known practice that is followed by almost every huge retailer in the market. The logic behind this is Machine Learning algorithms such as Association Rule Mining and Apriori algorithm:

• Association rule mining is a technique that shows how items are associated with each other.
• Apriori algorithm uses frequent itemsets to generate association rules. It is based on the concept that a subset of a frequent itemset must also be a frequent itemset.

Association Rule Mining – Artificial Intelligence Interview Questions – Edureka

For example, the above rule suggests that, if a person buys item A then he will also buy item B. In this manner the retailer can give a discount offer which states that on purchasing Item A and B, there will be a 30% off on item C. Such rules are generated using Machine Learning. These are then applied on items in order to increase sales and grow a business.

Q11. Place an agent in any one of the rooms (0,1,2,3,4) and the goal is to reach outside the building (room 5). Can this be achieved through AI? If yes, explain how it can be done.

Reinforcement Learning – Artificial Intelligence Interview Questions – Edureka

In the above figure:

• 5 rooms in a building connected by doors
• Each room is numbered 0 through 4
• The outside of the building can be thought of as one big room (5)
• Doors 1 and 4 directly lead into the building from room 5 (outside)

This problem can be solved by using the Q-Learning algorithm, which is a reinforcement learning algorithm used to solve reward based problems.

Let’s represent the rooms on a graph, each room as a node, and each door as a link, like so:

Reinforcement Learning – Artificial Intelligence Interview Questions – Edureka

Next step is to associate a reward value to each door:

Reinforcement Learning – Artificial Intelligence Interview Questions – Edureka

• doors that lead directly to the goal have a reward of 100
• Doors not directly connected to the target room have zero reward
• Because doors are two-way, two arrows are assigned to each room
• Each arrow contains an instant reward value

Now let’s try to understand how Q-Learning can be used to solve this problem. The terminology in Q-Learning includes the terms state and action:

• The room (including room 5) represents a state
• Agent’s movement from one room to another represents an action

In the figure, a state is depicted as a node, while “action” is represented by the arrows. Suppose, the Agent traverses from room 2 to room5, then the following path is taken:

1. Initial state = state 2
2. State 2 -> state 3
3. State 3 -> state (2, 1, 4)
4. State 4 -> state 5

Next, we can put the state diagram and the instant reward values into a reward table or a matrix R, like so:

Reinforcement Learning – Artificial Intelligence Interview Questions – Edureka

The next step is to add another matrix Q, representing the memory of what the agent has learned through experience.

• The rows of matrix Q represent the current state of the agent
• columns represent the possible actions leading to the next state

The formula to calculate the Q matrix:

Q(state, action) = R(state, action) + Gamma * Max [Q(next state, all actions)]

Here, Q(state, action) and R(state, action) represent the state and action in the Reward matrix R and the Memory matrix Q.

Note: The Gamma parameter has a range of 0 to 1 (0 <= Gamma > 1).

• If Gamma is closer to zero, the agent will tend to consider only immediate rewards.
• If Gamma is closer to one, the agent will consider future rewards with greater weight

Finally, by following the below steps, the agent will reach room 5 by taking the most optimal path:

Reinforcement Learning – Artificial Intelligence Interview Questions – Edureka

Q12. The crop yield in India is degrading because farmers are unable to detect diseases in crops during the early stages. Can AI be used for disease detection in crops? If yes, explain.

AI can be used to implement image processing and classification techniques for extraction and classification of leaf diseases.

Image Processing Using AI – Artificial Intelligence Interview Questions – Edureka

This sounds complex, let me break it down into steps:

Image Acquisition: The sample images are collected and stored as an input database.

Image Pre-processing: Image pre-processing includes the following:

• Improve image data that suppresses unwanted distortion
• Enhance image features
• Image clipping, enhancement, color space conversion
• Perform Histogram equalization to adjust the contrast of an image
  

Image Segmentation: It is the process of partitioning a digital image into multiple segments so that image analysis becomes easier.  Segmentation is based on image features such as color, texture. A popular Machine Learning method used for segmentation is the K-means clustering algorithm.

Feature Extraction: This is done to extract information that can be used to find the significance of a given sample. The Haar Wavelet transform can be used for texture analysis and the computations can be done by using Gray-Level Co-Occurrence Matrix.

Classification: Finally, Linear Support Vector Machine is used for classification of leaf disease. SVM is a binary classifier which uses a hyperplane called the decision boundary between two classes. This results in the formation of two classes:

1. Diseased leaves
2. Healthy leaves

Therefore, AI can be used in Computer Vision to classify and detect disease by studying and processing images. This is one of the most profound applications of AI.

Q13. What is the future of Artificial Intelligence?

The future of Artificial Intelligence (AI) holds immense potential and is expected to have a transformative impact on various aspects of society and industry. While we cannot predict the future with certainty, there are several trends and possibilities that experts foresee in the field of AI:

1. Advancements in AI Technology: AI technologies are continuously evolving, and we can expect significant advancements in areas like natural language processing, computer vision, reinforcement learning, and autonomous systems. These advancements will lead to more capable and intelligent AI systems.
2. Integration of AI into Various Industries: AI is already being integrated into various industries, including healthcare, finance, manufacturing, transportation, and more. In the future, AI is expected to become even more prevalent, optimizing processes, improving decision-making, and enhancing efficiency across sectors.
3. AI for Personalization: AI will enable highly personalized experiences for users in areas like entertainment, e-commerce, education, and healthcare. AI-powered recommendation systems and personal assistants will cater to individual preferences and needs.
4. Autonomous Vehicles and Robotics: Self-driving cars, drones, and robotic systems will become more sophisticated and widely adopted. Autonomous vehicles are expected to revolutionize transportation, making it safer and more efficient.
5. Ethical AI and Regulation: As AI becomes more prevalent, there will be increased focus on ethical considerations, bias mitigation, and responsible AI development. Regulatory frameworks may be established to govern the use of AI to ensure fairness, transparency, and privacy.
6. AI in Healthcare: AI is expected to play a crucial role in healthcare, from medical imaging analysis to drug discovery and personalized medicine. AI-powered diagnostic tools and virtual health assistants may become more common.
7. AI and Climate Change Solutions: AI can be harnessed to address environmental challenges, such as climate modeling, energy optimization, and sustainable resource management.
8. AI and Creativity: AI technologies are starting to demonstrate creative abilities, such as generating art, music, and writing. In the future, we may see AI collaborating with human artists and creators to produce novel works.
9. Quantum AI: The emergence of quantum computing may unlock new possibilities in AI, leading to exponential increases in processing power and enabling AI algorithms to solve complex problems at unprecedented speed.
10. AI and Education: AI-based personalized learning systems may revolutionize education by catering to individual learning styles and providing more effective and accessible education for learners of all ages.

While the potential benefits of AI are substantial, there are also challenges, including ethical considerations, job displacement, and cybersecurity risks. Striking a balance between leveraging AI’s capabilities for societal good while addressing its potential negative implications will be crucial.

Overall, the future of AI is full of promise and possibilities. It will continue to shape and redefine various aspects of our lives, driving innovation, improving efficiency, and offering solutions to complex challenges. As AI technology progresses, responsible and ethical development will be paramount to ensuring a positive and inclusive future with AI as a force for good.

Q14. What are the misconceptions about Artificial Intelligence?

Sure, let’s go over some common misconceptions about Artificial Intelligence (AI):

1. AI is Human-Like: One of the most pervasive misconceptions is that AI is human-like with emotions, consciousness, and self-awareness. In reality, AI is based on algorithms and data processing, lacking emotions and self-awareness.
2. AI Will Take Over the World: Some fear that AI will surpass human intelligence and take control of the world, as depicted in movies and sci-fi literature. In reality, AI is a tool designed and controlled by humans, and its behavior depends on its programming.
3. AI is All About Robots: While robots are a visible application of AI, AI encompasses a broad range of technologies, including machine learning, natural language processing, computer vision, and more.
4. AI is Always accurate. AI can make mistakes, especially if trained on biased or limited data. Ensuring the accuracy and fairness of AI systems requires careful development and evaluation.
5. AI Will Replace Human Jobs Completely: While AI can automate certain tasks, it is more likely to augment human capabilities and create new job opportunities in AI development and management.
6. AI Development is Expensive and Complex: While advanced AI projects may require significant resources, there are also open-source tools and platforms that make AI development more accessible.
7. AI is a Recent Invention: AI has a long history dating back to the mid-20th century. While recent advances have accelerated progress, AI research has been ongoing for decades.
8. AI is Science fiction. AI is a real and practical technology used in various applications today, from virtual assistants to recommendation systems and medical diagnostics.
9. AI Will Solve All Problems: AI is a powerful tool, but it is not a magical solution that can address all challenges. It is one tool among many that can be used to tackle complex issues.
10. AI is Ethically Neutral: AI can inherit biases present in the data used for training, and ethical considerations are crucial to ensuring its fair and responsible use.

It’s essential to dispel these misconceptions and have accurate discussions about AI’s capabilities and limitations. Understanding AI’s potential and its ethical implications is crucial as it becomes more integrated into various aspects of society and industry. Responsible and informed use of AI can lead to its positive impact and better decision-making in the future.

Q15. What is the difference between a strong AI and a weak AI?

The difference between strong AI and weak AI lies in their level of intelligence and capabilities:

1. Strong AI (Artificial General Intelligence – AGI):

Strong AI, also known as Artificial General Intelligence (AGI), refers to AI systems that have human-like intelligence and are capable of understanding, learning, and performing any intellectual task that a human can do. These AI systems have the ability to reason, think abstractly, generalize knowledge across different domains, and exhibit self-awareness. Strong AI would possess a level of consciousness and general problem-solving abilities similar to that of a human.

At present, Strong AI does not exist, and achieving it is still a subject of ongoing research and speculation. Developing Strong AI raises significant ethical and societal implications, as it would potentially have profound effects on human society.

2. Weak AI (Artificial Narrow Intelligence – ANI):

 Weak AI, also known as Artificial Narrow Intelligence (ANI), refers to AI systems that are designed and trained for a specific task or a narrow range of tasks. These AI systems excel at their specialized tasks and can outperform humans in those specific areas, but they lack the broader cognitive abilities and general intelligence of humans.

Most of the AI applications in use today, such as voice assistants, image recognition systems, recommendation engines, and chatbots, are examples of Weak AI. These systems are highly valuable for their specific purposes, but they are limited in scope and cannot perform tasks beyond their pre-defined domains.

Therefore, the key difference is that Strong AI aims to replicate human-level general intelligence, whereas Weak AI is designed to excel at specific tasks without possessing human-like cognition or consciousness. Strong AI remains a theoretical goal, while Weak AI is the practical reality that we currently use in various applications.

So these are the most frequently asked questions in an Artificial Intelligence Interview. However, if you wish to brush up more on your knowledge, you can go through these blogs:

• Machine Learning Tutorial for Beginners
• Deep Learning Tutorial: Artificial Intelligence Using Deep Learning
• Machine Learning Algorithms
• A Guide To Machine Learning Interview Questions And Answers
• How to Become an Artificial Intelligence Engineer?

With this, we come to an end of this blog. I hope these Artificial Intelligence Interview Questions will help you ace your AI Interview.

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