Fantastic Web Development Test - 73+ MCQs: Web Development Quiz: Test Your Skills with Coding Questions and Answers

1. In JavaScript, what is the purpose of the 'map' method?

To create a new array

To loop over elements of an array

To check the type of a variable

To define a new function

2. In CSS, what is the purpose of the 'flexbox' layout?

To create animations

To define font styles

To structure a page

To design flexible and efficient layouts

3. Explain the concept of 'Immutable.js' in JavaScript.

Immutable.js is a CSS framework for creating responsive web designs.

It is a JavaScript library used for working with immutable data structures.

Immutable.js is a keyword for declaring constants in JavaScript.

It refers to the practice of writing code that cannot be changed or modified.

4. What does the CSS property 'display: none;' do?

Hides the element

Changes the element's background color

Increases the element's font size

Centers the element on the page

5. What is the role of the 'SELECT' element in HTML forms?

To create a text input field

To define a dropdown menu

To display a list of options

To insert a checkbox

6. Which HTML5 element is used to play video files?

<video>

<media>

<play>

<movie>

7. What does the 'return' statement do in a JavaScript function?

Ends the function's execution

Returns a value from the function

Prints a message to the console

Creates a loop in the function

8. What is the purpose of the 'localStorage' object in web development?

To store data on the server

To manipulate CSS styles

To handle server-side operations

To store key-value pairs in a web browser

9. Explain the concept of 'JWT' (JSON Web Token) in web development.

JWT is a technique for optimizing network requests.

It is a JavaScript library for handling user authentication.

JWT is a JSON-based open standard for creating access tokens that assert claims.

It is a CSS framework for designing responsive web layouts.

10. What is the purpose of the 'Observer' pattern in web development?

The Observer pattern is used to organize and structure CSS code.

It is a JavaScript method for handling user interactions.

The Observer pattern is a behavioral design pattern where an object, known as the subject, maintains a list of dependents, known as observers, that are notified of any changes in state.

It refers to the process of optimizing web page loading speed.

11. In web development, what is the purpose of the 'viewport' meta tag?

To style text content

To control the browser window size

To manipulate server-side data

To optimize the display on different devices

12. What is the role of the 'async' keyword in JavaScript?

To declare a variable

To indicate that a function returns a promise

To define a loop

To create dynamic animations

13. Which CSS property is used to control the space between lines of text?

line-height

text-spacing

line-spacing

text-height

14. What is the purpose of the 'prototype' property in JavaScript?

It is used to define the layout structure of a web page.

It is a keyword for creating objects in JavaScript.

It allows the addition of properties and methods to existing object types.

It is a CSS property for styling text content.

15. Explain the difference between 'let', 'const', and 'var' in JavaScript.

'let' and 'const' have block scope, while 'var' has function scope.

'let' and 'const' are used for declaring variables with constant values, while 'var' is used for regular variables.

'const' is used for constant values, 'let' for regular variables, and 'var' for global variables.

'var' and 'const' have block scope, while 'let' has function scope.

16. What is the purpose of the 'spread operator (...) in JavaScript?

To concatenate strings

To access object properties

To create a loop

To expand arrays and objects

17. Explain the concept of 'hoisting' in JavaScript.

It refers to the process of moving variable and function declarations to the top of their containing scope during the compilation phase.

It is a method for organizing code into modular components.

It describes the way variables are assigned values in JavaScript.

It is the process of creating a visual hierarchy in CSS.

18. What is the purpose of HTML?

Hypertext Markup Language

High-Level Text Markup Language

Home Tool Markup Language

Hyperspace Transfer Markup Language

19. Which HTML tag is used to define the structure of an HTML document?

<html>

<head>

20. Which of the following is a valid JavaScript variable name?

_myVar

123var

$result

variable name

21. What does the 'z-index' property control in CSS?

The position of an element along the z-axis

The font size of an element

The color of an element

The width of an element

22. What is the purpose of the 'Promise' object in JavaScript?

It is used to create animations in web development.

It is a keyword for declaring variables.

It represents the eventual completion or failure of an asynchronous operation and its resulting value.

It is a CSS property for controlling layout structure.

23. What does the 'debounce' function do in JavaScript?

Delays the execution of a function

Defines a new function

Performs mathematical operations

Creates dynamic animations

24. What does the 'addEventListener' method do in JavaScript?

Adds an event handler to an element

Defines a new function

Creates a loop

Performs mathematical operations

25. What is the purpose of the 'alt' attribute in an HTML image tag?

It defines alternative text for the image

It sets the image alignment

It specifies the image source

It controls image visibility

26. What does CSS primarily define?

Counter Style Sheet

Computer Style Layout

Cascading Style Structure

Cascading Style Sheet

27. What does the 'localStorage' object in JavaScript allow you to do?

Access local files

Store key-value pairs in a web browser

Connect to a database

Manipulate server-side data

28. In JavaScript, what is a closure?

A block of code that performs a specific task

A function that takes no arguments

A way to create private variables

An event listener for mouse clicks

29. Which of the following is a valid HTML5 semantic element?

<block>

<style>

30. What is the purpose of the 'Babel' tool in web development?

Babel is a tool for optimizing images on a website.

It is a JavaScript library for handling AJAX requests.

Babel is a build tool that translates ECMAScript 2015+ code into a backward-compatible version of JavaScript.

It is a CSS preprocessor for styling web pages.

Web Development MCQ Test 3