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If your software takes excessive time to load or stalls while performing, the users will simply switch it off. You will be losing customers to your competition. If you are planning to start your career in Software Testing and you wish to know the skills related to it, now is the right time to dive in. These Performance Testing Interview Questions and Answers are collected after consulting with Performance Testing Certification Training experts.
The Performance Testing Interview Questions are divided into 2 sections:
Q1. What is Performance Testing?
Performance Testing is a type of software testing which ensures that the application is performing well under the workload. The goal of performance testing is not to find bugs but to eliminate performance bottlenecks. It measures the quality attributes of the system.
The attributes of Performance Testing include:
Q2. What are the different types of Performance Testing?
The different types of performance testing are:
Q3. What are the common performance problems faced by users?
Some of the common performance problems faced by users are:
Q4. Name some of the common Performance Testing Tools.
The market is full of a number of tools for test management, performance testing, GUI testing, functional testing, etc. I would suggest you opt for a tool which is on-demand, easy to learn as per your skills, generic and effective for the required type of testing. Some of the common Performance Testing tools are:
Q5. List out some common Performance bottlenecks.
Some common performance bottlenecks include:
Q6. What are the Parameters considered for Performance Testing?
The Parameters for Performance Testing are:
Q7. What are the factors for selecting Performance Testing Tools?
The factors that you must keep in mind while selecting Performance Testing Tools include:
Q8. What is the difference between Performance Testing & Functional Testing?
|Performance Testing||Functional Testing|
Q9. What is throughput in Performance Testing?
Throughput is referred to the amount of data transported to the server in responds to the client request at a given period of time. It is calculated in terms of requests per second, calls per day, reports per year, hits per second, etc. Performance of application depends on throughput value, higher the value of throughput -higher the performance of the application.
Q10. What are the benefits of LoadRunner in testing tools?
Some of the benefits of LoadRunner are:
Q11. What is Endurance Testing & Spike Testing?
Endurance Testing – It is a type of performance testing where the testing is conducted to evaluate the behavior of the system when a significant workload is given continuously.
Spike Testing – It is a type of performance testing that is performed to analyze the behavior of the system when the load is increased substantially.
Q12. What are the common mistakes done in Performance Testing?
The common mistakes done in Performance Testing are:
Q13. What are the different phases for automated Performance Testing?
Phases for automated performance testing include:
Q14. What is the difference between Benchmark Testing & Baseline Testing?
|Benchmark Testing||Baseline Testing|
Q15. What is concurrent user load in Performance Testing?
Concurrent user load in performance testing can be defined as something when many users hit any functionality or operation at the same time. Concurrent user load testing sends simultaneous artificial traffic to a web application in order to stress the infrastructure and record system response times during periods of sustained heavy load.
Q16. What is a Protocol? Name some Protocols
A protocol is a defined as a set of various rules for the purpose of information communication between the two or more systems.
Some of the Protocols are :
Q17. What is a Performance Tuning?
Performance tuning is the improvement of system performance. Typically in computer systems, the motivation for such activity is called a performance problem. It can be either real or anticipated and most systems will respond to increased load with some degree of decreasing performance.
Q18. What are the types of Performance Tuning?
There are two types of Performance Tuning:
Q19. List the need for opting for Performance Testing.
Performance testing is generally required to validate the following:
Q20. What are the reasons behind the discontinuation of manual load testing?
There were certain drawbacks of manual Load Testing that lead to the adoption of Automation load testing. Some of the reasons are:
Q21. What is Profiling in Performance Testing?
Profiling is a procedure of pinpointing a bottleneck performance at miniature levels. This mainly includes developers or performance testers and is done by presentation teams for manufacturing . You can profile in any application layer which is getting tested. If you want to do application profiling you may require utilizing tools for performance profiling of application servers.
Q22. What are the entering & exiting criteria for Performance Testing?
The starting of the performance testing is done at the design level only. After the testing is done, results are collected and later they are analyzed in order to make improvements regarding the performance. During the whole process of life cycle development, performance tuning is done and the factors on which it is based are scalability and reliability during the presence of the load, application release time and tolerance criteria of performance and stress.
Q23. What are the activities involved in Performance Testing?
The activities involved in Performance Testing are:
Q24. What is Stress Testing & Soak Testing?
Stress Testing – It is a software testing activity that determines the robustness of software by testing beyond the limits of normal operation. The performance results are analysed to know how far the resources can sustain the upper limit with good performance as expected.
Soak Testing – Soak Testing is a type of performance test that verifies a system’s stability and performance characteristics over an extended period of time. System resources are monitored with their performances getting affected with load increase.
Q25. Differentiate between Performance Testing & Performance Engineering
The process of identifying the issues that disturbs the performance of any application is performance testing whereas, improving the performance of the application by observing the measurements got from the performing testing by necessary changes in terms of architecture, resources, implementation etc is performance engineering.
Q26. What is JMeter?
JMeter is one of the Java tools which is used to perform load testing client/server applications. Apache JMeter is open source software, a 100% pure Java desktop application designed to load test functional behaviour and measure performance of the application.
Q27. How does JMeter work?
JMeter acts like a group of users sending requests to a target server. It collects response from target server and other statistics which show the performance of the application or server via graphs or tables.
Q28. What are Regular Expressions in JMeter?
Regular Expressions are used to search and manipulate text. JMeter is used for interpreting forms of regular expression or patterns being used throughout a JMeter test plan.
Q29. What are Samplers & Thread Groups?
Samplers – Sampler generates one or more sample results. These sample results have many attributes like elapsed time, data size, etc. It allows JMeter to send specific types of requests to the server, through samplers, thread group decides which type of request it need to make. Some of the useful samplers are HTTP request, FTP request, JDBC request etc.
Thread Groups – JMeter is the beginning part of thread group elements. It is an important element of JMeter, where you can set number of users and time to load all the users given in the thread group.
Q30. What are the types of processor in JMeter?
The two types of JMeter are:
Q31. What are Pre-processor elements? List some of the elements.
A pre-processor is something that will happen before sampler executes. To configure the sample request prior to its execution or to update variables that are not extracted from response text pre-processor elements are used.
Some of the pre-processor elements include:
Q32. What is a Timer in JMeter? What are the types of it?
A JMeter thread by default will send requests continuously without any pause. Timers are used to get a pause between the request.
The different types of Timer in JMeter are:
Q33. What is Test Fragment?
Test fragment is a type of element like Thread Group element. The only difference is test fragment is not implemented unless it is referenced by either a Module controller or an Include controller.
Q34. What is Assertion in JMeter? List the types of Assertion.
Assertion helps to verify that your server under test returns the expected results.
The Types of Assertion include:
Q35. What is the execution order of Test Elements?
The execution order of Test Elements is in the following sequence:
Q36. What are Configuration Elements?
Configuration Elements help you to create defaults and variables to be used by Samplers. They are also used to add or modify requests made by Samplers. These elements are executed at the start of the scope of which they are part. Therefore, a Configuration Element is accessed only from inside the branch where it is placed.
Q37. How to reduce the resource requirement in JMeter?
To reduce the resource requirements in JMeter:
Q38. How to perform Spike Testing in JMeter?
By synchronizing, timer JMeter spike testing can be achieved. Synchronizing timer, blocks thread until a specific amount of threads has been blocked and then release them all together thus creating large instantaneous load.
Q39. Mention some of the JMeter Listeners
Some of the JMeter Listeners are:
Q40. How to capture the script of the Authentication Window in JMeter?
You can capture script by recording in the following manner:
Q41. What are the types of Controllers in JMeter?
The two types of Controllers in JMeter are:
Q42. What are Pre-processor & Post-processor Elements?
Pre-processor – A Pre-Processor is something that will happen before a sampler executes. They are often used to modify the settings of a Sample Request just before it runs.
Post-processor – A Post-Processor executes after a sampler finishes its execution. This element is most often used to process the response data.
Q43. What are the uses of Monitor Test?
Some of the uses of Monitor Test are:
Q44. What are the benefits provided by JMeter for Performance Testing?
Some of the benefits provided by JMeter for Performance Testing are:
Q45. What is Distributed Load Testing & how to achieve it?
Distributed load testing is the process through which numerous systems can be used for simulating a load of a large number of users. JMeter can do distribute load testing with the help of master-slave configuration.
Q46. What are the different ways of Data Parameterization in JMeter?
Data Parameterization makes the scripts reusable where the values need not be hardcoded for the same request with different parameters.
Q47. What are the differences between JMeter & LoadRunner?
Q48. What are the important plugins supported in JMeter?
The important plugins supported in JMeter are:
Q49. Mention the differences between JMeter and SoapUI
Q50. What is Workbench?
Workbench is a storage area for adding some components which can be added to test plan if required. Components of workbench does not get saved with the test plan automatically. They have to be saved separately as test fragments.
With this, we have come to the end of Performance Testing interview questions article. I Hope these Performance Testing Interview Questions will help you in your interviews. In case you have attended any interviews in the recent past, do paste those interview questions in the comments section and we’ll answer them.
Also, check out the Performance Testing Certification Training by Edureka, a trusted online learning company with a network of more than 250,000 satisfied learners spread across the globe. This course provides you insights into software behavior during workload. In this course, you will learn how to check the response time and latency of software and test if a software package is efficient for scaling. The course will help you check the strength and analyze the overall performance of an application under different load types.