Full Stack Web Development Internship Program
- 29k Enrolled Learners
- Weekend/Weekday
- Live Class
With the advancement in the world of digital marketing or web development, companies are more inclined towards measures that will help them reach their potential clients. Usually, companies hire high-end developers to build responsive websites that can target mobile-based customers as well as desktop customers. These Bootstrap Interview Questions will help you crack any interview for a developer role.
Bootstrap is a platform for web development based on a front-end framework. It is used to create exceptional responsive designs using HTML, and CSS. These templates are used for forms, tables, buttons, typography, models, tables, navigation, carousels and images. Bootstrap also has Javascript plugins, which are optional. Bootstrap is mostly preferred for developing mobile web applications.
Bootstrap has better features as compared to other web development platforms. It provides extensive browser support for almost every known browser such as Opera, Chrome, Firefox, Safari, etc. If you are well-acquainted with CSS and HTML, web development becomes easy on Bootstrap.
Also, it supports mobile applications with the help of responsive design and can adjust CSS as per the device, screen size, etc. Instead of creating multiple files, it creates only a single file reducing the work of a developer.
The key components of Bootstrap include:
Some of the features of Bootstrap are:
A class loader is a part of JRE or Java Runtime Environment which loads Java classes into Java virtual environment. Class loaders also perform the process of converting a named class into its equivalent binary form.
Class | Description |
.active | Applies the hover color to a particular row or cell |
.success | Indicates a successful or positive action |
.warning | Identifies a warning that might need attention |
.danger | Indicates a dangerous or potentially negative action |
There are two major layouts for Bootstrap:
Bootstrap includes a responsive, mobile-first fluid grid system that appropriately scales up to 12 columns as the device or viewport size increases. It includes predefined classes for easy layout options, as well as powerful mixins for generating more semantic layouts.
Example of a basic grid structure:
<div class = "container"> <div class = "row"> <div class = "col-*-*"></div> <div class = "col-*-*"></div> </div> <div class = "row">...</div> </div> <div class = "container">....
Jumbotron is used for highlighting content in bootstrap. It could either be a slogan or probably a headline. It increases the heading size and gives a margin for the content of the landing page. To implement Jumbotron in a Bootstrap, you have to use:
Create a container <div> with the class of .jumbotron
For example, use <div class=”container”> if you don’t want Jumbotron to reach the screen’s edge.
There are two simple ways to display code in Bootstrap:
Bootstrap sets a basic global display (background), typography, and link styles.
Basic Global display − It sets background-color: #fff; on the <body> element.
Typography − This uses the @font-family-base, @font-size-base, and @line-height-base attributes as the typographic base
Link styles − It sets the global link color via attribute @link-color and applies link underlines only on :hover.
Progress bar is used with HTML tag style in HTML element using <progress> keyword. In bootstrap we use html5 <progress> with CSS classes that have special features in bootstrap, that is only made for the progress bar.
Bootstrap allows to make the images responsive by adding a class .img-responsive to the <img> tag. This class applies max-width: 100%; and height: auto; to the image so that it scales nicely to the parent element.
Bootstrap | Foundation |
|
|
The steps for creating basic or vertical forms include:
Bootstrap collapsing elements enable you to collapse any particular element without writing any JavaScript code or the accordion markup. To apply collapsing elements in bootstrap, you need to add data-toggle= “collapse” to the controller element along with a data-target or href to automatically assign control of a collapsible element. Also, you can use .collapse (options), .collapse (‘show’) or .collapse (‘hide’) for the same.
Bootstrap supports three types of lists such as:
Ordered lists − An ordered list is a list that falls in some sort of sequential order and is prefaced by numbers.
Unordered lists − An unordered list is a list that doesn’t have any particular order and is traditionally styled with bullets. If you do not want the bullets to appear then you can remove the styling by using the class .list-unstyled.
Definition lists − In this type of list, each list item can consist of both the <dt> and the <dd> elements. <dt> stands for definition term. Subsequently, the <dd> is the definition of the <dt>.
Media objects in Bootstrap help you to put media object like image, video or audio to the left or right of the content blocks. Media element can be created using the class .media and the source is specified in using the class .media-object. Media-objects are of two types.
The two types of media object are:
Carousel plugin in bootstrap is used to make sliders in the web pages or your site. There are several carousel plugins that are used in bootstrap to display large contents within a small space by adding sliders.
Examples: .carousel(options), .carousel(‘pause’), .carousel(cycle’), .carousel(‘prev’), .carousel(‘next’).
Bootstrap offers various options for styling navigation elements. All of these use the same markup and base class .nav. You need to perform the following steps to create Tabular Navigation or Tabs:
Glyphicons are icon fonts which can be used in your web projects. Glyphicons Halflings are not free and require licensing. However, their creator has made them available for Bootstrap projects without any cost.
To use the icons, you just have to use the following code just about anywhere in your code. Leave a space between the icon and text for proper padding.
<span class = "glyphicon glyphicon-search"></span>
The steps involved in creating vertical or basic forms are:
Firstly, a role form can be added to the parent <form> element.
Next, you have to add appropriate spacing by wrapping labels and control in <div> and using the function ‘class .form-group’.
Finally, apply the function ‘class .form-control’ to different elements such as text url <input> , <textarea> and <select>
Bootstrap well is nothing but a container that makes the content appear sunken. Sometimes it may also give an inset effect on the webpage. Thus, a developer can create a well and also wrap the content in the well with the help of <div> and class .well. The content would appear as per your wish.
Input groups are extended Form Controls. You can easily prepend and append text or buttons to the text-based inputs with the help of input groups. Also, you can add common elements to the user’s input. For example, you can add the dollar symbol, the @ for a Twitter username, or anything else that might be common for your application interface.
To prepend or append elements to a .form-control you need to do the following:
Wrap it in a <div> with class .input-group
In the next step, place your extra content inside a <span> with class .input-group-addon.
Now place this <span> either before or after the <input> element.
Breadcrumbs are a great way to show hierarchy-based information for a site. In the case of blogs, breadcrumbs can show the dates of publishing, categories, or tags. They indicate the current page’s location within a navigational hierarchy.
A breadcrumb in Bootstrap is simply an unordered list with a class of .breadcrumb. The separator is automatically added by CSS.
To create thumbnails using Bootstrap you need to do the following:
A bootstrap container is a class which is useful and creates a central area within the page where our site content can be put within. The advantage of the bootstrap .container is that it is responsive and will place all our other HTML code.
Pagination is the handling of an unordered list by bootstrap. If you want to handle pagination, bootstrap provides the following classes:
.pagination: To get pagination on your page you have to add this class
.disabled, .active: Customize links by .disabled for unclickable links and .active to indicate the current page
.pagination-Ig, .pagination-sm: Use these classes to get different size item
Bootstrap Alerts provide a way to style messages to the user. They provide contextual feedback messages for typical user actions. You can add an optional close icon to alert. Also, you can add a basic alert by creating a wrapper <div> and adding a class of .alert and one of the four contextual classes.
You need to follow a few steps to build a dismissal alert:
First, you have to add a basic alert by creating a wrapper <div> and adding a class of .alert and one of the four contextual classes.
Also add optional .alert-dismissable to the above <div> class.
Next, you have to add a close button.
Finally, use the <button> element with the data-dismiss = “alert” data attribute.
To create a basic progress bar, you need to do the following:
Add a <div> with a class of .progress.
Next, inside the above <div>, add an empty <div> with a class of .progress-bar.
Add a style attribute with the width expressed as a percentage. For example, style = “40%”; indicates that the progress bar was at 40%.
The media objects are abstract object styles for building various types of components like blog comments, Tweets, etc. It features a left-aligned or right-aligned image alongside the textual content. The goal of the media object is to make the code for developing these blocks of information drastically shorter. And, this goal is achieved by applying classes to some of the simple markups.
The steps to create an animated progress bar are as follows:
Add a <div> with a class of .progress and .progress-striped. Also add class .active to .progress-striped.
Next, inside the above <div>, add an empty <div> with a class of .progress-bar.
Add a style attribute with the width expressed as a percentage. For example, style = “60%”; indicates that the progress bar was at 60%.
Column ordering is one of the most interesting features found in bootstrap. By using appropriate functions, the columns can be written easily and also in a defined order. You can also show them in another column. In order to change or alter the order of the column easily, the functions .col-md-push-* and .col-md-pull-* can be used.
The Bootstrap Grid System is a responsive, mobile-first system that scales up to 12 columns as per the increase in the device or viewport size. The system features predefined classes for easy layout options and powerful mix-ins for generating effectively semantic layouts.
Media Queries in Bootstrap allow you to move, show and hide content based on viewport size. Here is an example to show the basic structure of Bootstrap grid:
<div class = "container"> <div class = "row"> <div class = "col-*-*"></div> <div class = "col-*-*"></div> </div> <div class = "row">...</div> </div> <div class = "container">....
Bootstrap uses Normalize to establish cross-browser consistency.
Normalize.css is a modern, HTML5-ready alternative to CSS resets. It is a small CSS file that provides better cross-browser consistency in the default styling of HTML elements.
Bootstrap panel components are used for putting your DOM component in a box. To get a basic panel, simply add .panel and .panel-default classes to the <div> element. There are two ways of adding panel heading to a Bootstrap panel:
The purpose of using the Scrollspy plugin in Bootstrap is that it allows you to target certain sections of the page based on the scroll position. Thereafter, you can add .active classes, based on the scroll position, to the Bootstrap navbar.
We use the affix plugin in Bootstrap for affixing a <div> to some certain location on a webpage. The plugin also allows toggling pinning on and off for the affixed <div>. Social icons are the most popular example of using the affix plugin in Bootstrap.
The affixed <div> starts from a particular location on the webpage and scrolls with it. However, after a certain mark, it will be locked in place, thus stopping scrolling with the rest of the webpage.
When there is a need for putting the contents in a bordered box with some padding around, the panel components are used. They can be created with the .panel class and content inside the panel consists of a .panel-body class. For creating a basic panel, you need to add class .panel to the <div> element and add class .panel-default to this element.
Button groups allow multiple buttons to be stacked together on a single line. You can use this when you want to place items like alignment buttons together.
For basic button group, .btn-group class is used. Here, you can wrap a series of buttons with class .btn in .btn-group.
<div class="alert" role="alert">Warning! I'm missing something.</div>
Alert messages are used to provide feedback message and they usually require the attention of the user. Here it is important to note that Bootstrap Alerts don’t have default class. If a contextual class such as .alert-success, .alert-info, .alert-warning, or .alert-danger, is not provided, a default gray alert will be created.
Bootstrap provides major benefits to a developer. Some of them include:
It is a free and open-source Web Designing Framework.
Bootstrap has the support of all the web browsers like Internet Explorer, Google Chrome, Firefox, Opera, Safari, etc.
It is a very powerful mobile first front-end framework.
Also, it is very easy to start as one needs to have an idea of HTML and CSS only to work with it.
We can design a responsive website through it which adjust to desktop, tablet, and mobile.
It comprises functional built-in components which are easy to customize.
With this, we have come to the end of our Bootstrap Interview Questions. These are some of the most commonly asked questions when you are attending any bootstrap related interview.
Now that you have read the Top Bootstrap Interview Questions, check out our Full Stack Web Development Course which comes with instructor-led live training and real-life project experience. This training makes you proficient in skills to work with back-end and front-end web technologies. It includes training on Web Development, jQuery, Angular, NodeJS, ExpressJS, and MongoDB.
Got a question for us? Please mention it in the comments section of “Bootstrap Interview Questions” blog and we will get back to you.
Course Name | Date | Details |
---|---|---|
Full Stack Web Development Course | Class Starts on 9th November,2024 9th November SAT&SUN (Weekend Batch) | View Details |
edureka.co
Bootstrap interview questions