Javascript - Introduction

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1. What is the primary purpose of JavaScript?

Styling web pages

Server-side scripting

Client-side scripting

Database management

Difficulty

1600

low

2. What is an IIFE in JavaScript?

Internal Inline Function Execution

Immediate Invocation Function Expression

Inline If-Else

Internal Iterative Function Execution

Difficulty

2000

low

3. What does the term "DOM" stand for in JavaScript?

Document Object Model

Data Object Model

Document Oriented Module

Dynamic Object Manipulation

Difficulty

1700

low

4. When was JavaScript first introduced and by which company?

1995, Microsoft

1993, Netscape

2000, Google

1998, Sun Microsystems

Difficulty

1800

low

5. Who is often credited as the creator of JavaScript?

Bill Gates

Brendan Eich

Tim Berners-Lee

Mark Zuckerberg

Difficulty

1900

low

6. In the early days, what was the original name proposed for JavaScript?

LiveScript

WebScript

ScriptMaster

JavaScript was the original name

Difficulty

1800

low

7. Which programming language influenced the design of JavaScript?

Python

C++

Java

Scheme

Difficulty

2100

medium

8. What was the primary motivation behind the creation of JavaScript?

To enhance the performance of web browsers

To compete with Microsoft's programming languages

To enable client-side interactivity in web browsers

To replace Java as the main web development language

Difficulty

2200

medium

9. Which organization oversees the standardization of JavaScript?

W3C (World Wide Web Consortium)

ECMA International

IEEE (Institute of Electrical and Electronics Engineers)

IETF (Internet Engineering Task Force)

Difficulty

2200

medium

10. What is the ECMAScript specification, and how does it relate to JavaScript?

It is the official name of JavaScript.

It is a scripting language for web development.

It is a standard that JavaScript follows for its implementation.

It is an alternative to JavaScript for building web applications.

Difficulty

2300

medium

11. Which browser was the first to implement support for JavaScript?

Internet Explorer

Mozilla Firefox

Google Chrome

Netscape Navigator

Difficulty

2300

medium

12. What is the role of Node.js in the JavaScript ecosystem?

It is a web browser built using JavaScript.

It is a framework for front-end web development.

It allows JavaScript to be run on the server side.

It is a JavaScript testing library.

Difficulty

2400

medium

13. How has the introduction of JavaScript frameworks, such as Angular and React, impacted web development?

They have simplified server-side programming.

They have decreased the need for client-side scripting.

They have streamlined front-end development and enhanced user interfaces.

They have replaced JavaScript in modern web applications.

Difficulty

2400

medium

14. What was the original purpose of JavaScript when it was first introduced?

Server-side scripting

Database management

Client-side scripting for web browsers

Game development

Difficulty

2500

medium

15. Which version of JavaScript introduced the "let" and "const" keywords for variable declaration?

ECMAScript 5

ECMAScript 6 (ES2015)

ECMAScript 2018 (ES9)

ECMAScript 3

Difficulty

2600

medium

16. What is the significance of the "ES6" or "ECMAScript 2015" release in JavaScript?

It introduced asynchronous programming with Promises.

It added arrow functions, template literals, and destructuring assignments.

It focused on server-side scripting capabilities.

It deprecated the use of functions.

Difficulty

2700

medium

17. Which major browser engines support JavaScript?

Blink, Gecko, WebKit

Trident, Presto, EdgeHTML

V8, Chakra, SpiderMonkey

KHTML, Servo, Quantum

Difficulty

2800

medium

18. What is the purpose of the "AJAX" technique in JavaScript?

Animation and Juxtaposition of XHTML

Asynchronous JavaScript and XML

Advanced JavaScript and XHR

Array Joining and XML

Difficulty

2800

medium

19. Which popular JavaScript library is often used for simplifying DOM manipulation and Ajax requests?

jQuery

React

Angular

Vue.js

Difficulty

2700

medium

20. In the context of JavaScript, what does the term "callback" refer to?

A function passed as an argument to another function, to be executed later

A JavaScript error message

A type of loop structure

A method for defining classes in JavaScript

Difficulty

2800

medium

21. How does JavaScript differ from Java despite having a similar name?

JavaScript is a server-side language, while Java is client-side.

JavaScript is mainly used for web development, while Java is a general-purpose programming language.

JavaScript was developed by Microsoft, while Java was developed by Netscape.

JavaScript and Java are essentially the same language with different names.

Difficulty

2800

medium

22. What role does the "Canvas" element play in JavaScript?

It is used for including external scripts in a webpage.

It provides a drawing surface for graphics and animations.

It is a container for holding data in a structured format.

It is a styling element for creating visually appealing websites.

Difficulty

3000

medium

23. What is the role of the "document" object in JavaScript?

It represents the browser's document and provides methods to manipulate it.

It is used for mathematical calculations.

It is a built-in JavaScript function for error handling.

It refers to the global execution context.

Difficulty

3200

high

24. Which version of JavaScript introduced the "class" keyword for defining classes?

ECMAScript 2015 (ES6)

ECMAScript 3

ECMAScript 2018 (ES9)

ECMAScript 5

Difficulty

3500

high

25. What is the purpose of the "WebAssembly" standard in JavaScript?

To enhance web security

To enable cross-browser compatibility

To improve the performance of web applications by allowing code execution in a low-level, binary format

To create dynamic HTML elements

Difficulty

3400

high

Ehsan Arvacheh

1026 points

Ovi Baidya

1019 points

Introduction

Want to challenge your knowledge?

Question Bank

1. What is the primary purpose of JavaScript?

2. What is an IIFE in JavaScript?

3. What does the term "DOM" stand for in JavaScript?

4. When was JavaScript first introduced and by which company?

5. Who is often credited as the creator of JavaScript?

6. In the early days, what was the original name proposed for JavaScript?

7. Which programming language influenced the design of JavaScript?

8. What was the primary motivation behind the creation of JavaScript?

9. Which organization oversees the standardization of JavaScript?

10. What is the ECMAScript specification, and how does it relate to JavaScript?

11. Which browser was the first to implement support for JavaScript?

12. What is the role of Node.js in the JavaScript ecosystem?

13. How has the introduction of JavaScript frameworks, such as Angular and React, impacted web development?

14. What was the original purpose of JavaScript when it was first introduced?

15. Which version of JavaScript introduced the "let" and "const" keywords for variable declaration?

16. What is the significance of the "ES6" or "ECMAScript 2015" release in JavaScript?

17. Which major browser engines support JavaScript?

18. What is the purpose of the "AJAX" technique in JavaScript?

19. Which popular JavaScript library is often used for simplifying DOM manipulation and Ajax requests?

20. In the context of JavaScript, what does the term "callback" refer to?

21. How does JavaScript differ from Java despite having a similar name?

22. What role does the "Canvas" element play in JavaScript?

23. What is the role of the "document" object in JavaScript?

24. Which version of JavaScript introduced the "class" keyword for defining classes?

25. What is the purpose of the "WebAssembly" standard in JavaScript?

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