Top 10 Bootstrap Interview Questions And Answers

Q1. Define Bootstrap.

Bootstrap is a front-end framework that is used for creating HTML, CSS, and JS web applications. Its layout is very responsive, easy and fast to use. It mostly focuses on building a mobile application with having design templates for creating UI like Dropdown, Forms, Buttons, Alerts Tab, etc.

Q 2. Explain what is Bootstrap collapsing elements.

It allows you to collapse any particular element without using any JavaScript code.

To use this feature in bootstrap you have to add data-toggle=” collapse” to the controller element along with a data target to automatically assign the control of a collapsible element. We can use this by writing .collapse(options) etc.

Q 3. What is Bootstrap Well?

Bootstrap well is a form of container which thrives or makes the content to look recessed on the web page. It also wraps the content by using .well class.

Q4. Explain the uses of carousel plugin in Bootstrap.

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.

Example: .carousel(options), .carousel(‘pause’), .carousel(cycle’), .carousel(‘prev’), .carousel(‘next’).

Q5. Explain input group in Bootstrap.

Input group in bootstrap are put out from controls. By using an input group, we can easily add prepended and appended text or button to the text-based inputs.

We can prepend and append elements to a .form-control by taking all the elements in a <div> under a class .input-group. After that, place your extra content inside a <span> in same <div> by using class .input-group-addon after this you can place the <span> element either before or after the input element.

Q6. How we can create a navbar in Bootstrap?

To create a navbar in a bootstrap at first, we have to add the classes .navbar, .navbar-default to the <nav> tag. After this, we have to add the role=”navigation” to the above element, and this will help in accessibility.

We have added a header class .nav-header to the <div> element, which will include an <a> element with a class navbar brand. From this, we will get a text with a larger size.

Q 7. What is Bootstrap breadcrumb?

Bootstrap breadcrumb is an efficient way to show hierarchy-based information for a site. This can show the dates of publishing, categories or tags in a blog. They also tell the user about the current page location within a navigational hierarchy.

So we can say that Bootstrap breadcrumb is simply an unordered list with a class of .breadcrumb.

Q8. What is the work of affix plugin in Bootstrap?

This plugin allows a <div> to be attached to a location on the page.

Use of the social icon in a page is an example for this in which we see that the icons will start in a location, but when the page hits on a certain mark it will block the <div> in place and will stop the scrolling for rest of the page.

Q9. What is grid system in Bootstrap?

 By using the grid system, we can make up to 12 columns across a page. There are different classes which have been defined for this for the UI purpose.

Q10.How we can create a navbar in Bootstrap?

To create a navbar in a bootstrap at first, we have to add the classes .navbar, .navbar-default to the <nav> tag. After this, we have to add the role=”navigation” to the above element, and this will help in accessibility.

We have added a header class .nav-header to the <div> element, which will include an <a> element with a class navbar brand. From this, we will get a text with a larger size.