Overview of JavaScript

What is JavaScript?

JavaScript (JS) is a high-level, interpreted programming language primarily used for adding interactivity and dynamic content to websites. It is one of the core technologies of web development, alongside HTML (HyperText Markup Language) and CSS (Cascading Style Sheets).


Key Features of JavaScript

  • Client-Side Execution – Runs in web browsers, making pages dynamic.
  • Interpreted Language – Does not require compilation like Java or C++.
  • Dynamic Typing – Variables do not have fixed data types.
  • Event-Driven and Asynchronous – Supports handling user interactions and asynchronous operations.
  • Object-Oriented – Supports objects and prototypes.
  • Multi-Paradigm – Can be used for procedural, functional, or object-oriented programming.
  • Cross-Platform – Works on different operating systems and browsers.

Uses of JavaScript


✅ Web Development – Enhancing websites with interactivity (e.g., animations, pop-ups, forms).
✅ Web Applications – Used in frameworks like React, Angular, Vue.js for building interactive SPAs (Single Page Applications).
✅ Back-End Development – With Node.js, JavaScript can run on servers.
✅ Mobile App Development – Frameworks like React Native allow building mobile apps.
✅ Game Development – JS supports simple game development via Canvas API, Three.js.
✅ Automation & Scripting – Useful for automating repetitive tasks.
Qus. 1 : Javascript is _____ language

  1. Client Side
  2. Server Side
  3. Both A and B
  4. None of These
Qus. 2 : JavaScript is designed for following purpose

  1. To Perform Server Side Scripting Opertion
  2. To Execute Query Related to DB on Server
  3. To add interactivity to HTML Pages
  4. To Style HTML Pages
Qus. 3 : Find the only statement in the following that is correct.

  1. JavaScript interpreter processes programs written in Java.
  2. JavaScript interpreter processes commands in a script written in JavaScript.
  3. Java and JavaScript are almost similar
  4. JavaScript cannot be embedded in HTML.
Qus. 4 : For which of the following purpose(s) JavaScript is designed for ?

  1. To style HTML Pages
  2. To perform server-side scripting operation
  3. To execute query related to DB on server
  4. To add interactivity to HTML Pages
Qus. 5 : The extension of JavaScript file is

  1. .html
  2. .java
  3. .js
  4. .css
Qus. 6 : Which is Client Side Script Language

  1. CSS
  2. Python
  3. HTML
  4. JavaScript

Programs

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