Introduction To Bootstrap Interview Questions

 

Recently Asked Questions and Answers


1. Explain what is Bootstrap and its importance?

Bootstrap is a large collection of predefined reusable Code Snippets written in HTML, CSS, and Javascript. The Code Snippets include

Buttons
,
Cards
,
Carousels
, etc.

  • It is created by Twitter
  • It is currently used by companies like Twitter, LinkedIn, Spotify, Udemy, etc.
  • More than 20 million websites are built using Bootstrap till now.

Importance of Bootstrap:

  • Bootstrap can be used to develop desktop and mobile applications. There is a built-in capability to resize the app automatically, making it smooth to move from a website to a mobile app.
  • Bootstrap includes HTML and CSS-based design templates for 
    typography
    forms
    buttons
    tables
    navigation
    modals
    image carousels
    , etc.
  • The user interface is easy to use and built using Bootstrap.

2. What are the advantages of Bootstrap?

Some of the advantages of Bootstrap are:

  • Time Saving: Bootstrap provides predefined reusable code snippets which makes us not build everything from scratch.
  • Consistency: Bootstrap provides consistent output across all the browsers. It also solves inconsistencies between designers and developers.
  • Customizable: Bootstrap themes and templates can be customized as per our project requirement.
  • Cross-browser Compatible: Bootstrap is compatible with all the latest versions of browsers.
  • Easy to Use: Bootstrap is very simple to use. The setup process doesn't take too long and is relatively easy, even for beginners.

3. How to use Bootstrap code snippets?

To use the Code Snippets provided by Bootstrap, we need to add a piece of code within the HTML

head
element. We call it Bootstrap CDN.



<!DOCTYPE html>
<html>
  <head>
    <link
      rel="stylesheet"
      href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css"
      integrity="sha384-JcKb8q3iqJ61gNV9KGb8thSsNjpSL0n8PARn9HuZOnIxN0hoP+VmmDGMN5t9UJ0Z"
      crossorigin="anonymous"
    />
    <script
      src="https://code.jquery.com/jquery-3.5.1.slim.min.js"
      integrity="sha384-DfXdz2htPH0lsSSs5nCTpuj/zy4C+OGpamoFVy38MVBnE+IbbVYUew+OrCXaRkfj"
      crossorigin="anonymous"
    ></script>
    <script
      src="https://cdn.jsdelivr.net/npm/popper.js@1.16.1/dist/umd/popper.min.js"
      integrity="sha384-9/reFTGAW83EW2RDu2S0VKaIzap3H66lZH81PoYlFhbGU+6BZp6G7niu735Sk7lN"
      crossorigin="anonymous"
    ></script>
    <script
      src="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js"
      integrity="sha384-B4gt1jrGC7Jh4AgTPSdUtOBvfO8shuf57BaghqFfPlYxofvL8/KUEfYiJOMMV+rV"
      crossorigin="anonymous"
    ></script>
  </head>
  <body>
    <button class="btn btn-primary">Get Started</button>
    <button class="btn btn-secondary">Get Started</button>
  </body>
</html>

4. Name some of the Bootstrap class names?

Some of the Bootstrap class names are:

  • btn
  • btn-primary
  • row
  • container
  • text-center
  • text-danger
    ..... many more

5. Who Developed The Bootstrap?

The Bootstrap is developed by Mark Otto and Jacob Thornton at Twitter.


6. Why Bootstrap is preferred for website development?

  • Bootstrap has better features as compared to other web development platforms.

  • It provides predefined reusable code snippets that enable the web developer to create a new website quickly. No need to do code from scratch.

  • It provides extensive browser support for almost every known browser such as Opera, Chrome, Firefox, Safari, etc.

  • It supports mobile applications with the help of responsive design and can adjust CSS as per the device, screen size, etc.

  • It has a Massive Support Community that helps web developers when an issue occurs.

  • Bootstrap provides JavaScript plugins that add more interaction to the website.


7. What does the Bootstrap package include?

The Bootstrap package includes,

Scaffolding: Bootstrap provides a basic structure with Grid System, link styles, and background.

CSS: Bootstrap comes with the feature of global CSS settings, fundamental HTML elements style and an advanced grid system.

Components: Bootstrap contains a lot of reusable components to provide iconography, dropdowns, navigation, alerts, pop-overs, and much more.

JavaScript Plugins: Bootstrap also contains a lot of custom JavaScript plugins. We can easily include them all, or one by one.

Customize: Bootstrap components are customizable and we can customize Bootstrap's components to get our own style.


8. What are the differences between Bootstrap and Foundation?

Some of the differences between Bootstrap and Foundation are:

BootstrapFoundation
Bootstrap offers an unlimited number of UI elements.In Foundation UI element options are very limited.
Bootstrap uses pixels.Foundation uses REMs.
Bootstrap is easy to useFoundation is not great for beginners compared to Bootstrap

9. What are the differences between different bootstrap versions?

Some of the differences between Bootstrap 5, Bootstrap 4, and Bootstrap 3 are:

Bootstrap 5Bootstrap 4Bootstrap 3
Has separate Portrait and Landscape mode on Smartphones.Has separate Portrait and Landscape mode on Smartphones.Both Portrait and Landscape mode looks identical.
Container size is 1320pxContainer Size is 1140pxContainer Size is 1170px
Has six class names prefixes (col-xxl, col-xl, col-lg-, col-md- , col-sm-, col-)Has five class names prefixes (col-xl, col-lg-, col-md-, col-sm-, col-)Has four class names prefixes (col-lg-, col-md-, col-sm-, col-xs-)
Uses CSS Flexbox, CSS functions and variablesUses CSS FlexboxUses CSS Float and Clear
Has only responsive layoutHas only responsive layoutHas non responsive layout option
Uses better CardsUses Cards instead of wells and panelsUses No Cards

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