Web Development Intermediate

1. What is the purpose of SQL?

• A. To style web pages
• B. To query and manage relational databases ✓
• C. To write server-side scripts
• D. To create mobile apps

💡 SQL (Structured Query Language) is used to interact with relational databases — querying, inserting, updating, and deleting data.

2. What is the purpose of "version control" in programming?

• A. To speed up code execution
• B. To style code
• C. To track and manage changes to code over time ✓
• D. To debug code

💡 Version control (like Git) tracks changes to code, allows collaboration, and enables reverting to previous versions.

3. What is the difference between "==" and "===" in JavaScript?

• A. No difference
• B. === is faster
• C. == checks value only; === checks value and type ✓
• D. == checks type; === checks value

💡 == compares values with type coercion. === (strict equality) compares both value and type without coercion.

4. What does JSON stand for?

• A. Java Source Object Notation
• B. JavaScript Object Notation ✓
• C. Java Serialized Object Node
• D. JavaScript Online Notation

💡 JSON (JavaScript Object Notation) is a lightweight data format for storing and transporting data between a server and client.

5. What does DOM stand for in web development?

• A. Document Object Model ✓
• B. Data Object Management
• C. Document Oriented Markup
• D. Dynamic Object Model

💡 The DOM (Document Object Model) is a programming interface for HTML and XML documents, representing the page as a tree of nodes.

6. What is the difference between GET and POST HTTP methods?

• A. GET is faster; POST is slower
• B. GET submits data securely; POST does not
• C. GET retrieves data; POST sends data to be processed ✓
• D. They are identical

💡 GET retrieves data from a server. POST sends data to the server for processing, like form submissions.

7. What does REST stand for in web APIs?

• A. Remote Execution State Transfer
• B. Representational State Transfer ✓
• C. Remote Entity Service Transfer
• D. Resource Execution State Transfer

💡 REST (Representational State Transfer) is an architectural style for designing networked APIs using HTTP methods.

8. What is the purpose of the "localStorage" in browsers?

• A. To run JavaScript
• B. To style pages
• C. To store data persistently in the browser with no expiry ✓
• D. To make HTTP requests

💡 localStorage allows web applications to store key-value pairs persistently in the browser with no expiration time.

9. What is a "cookie" in web development?

• A. A type of database
• B. A small piece of data stored in the browser ✓
• C. A server-side script
• D. A type of CSS selector

💡 Cookies are small text files stored in the browser to remember user preferences, sessions, and tracking data.

10. What is "responsive design" in web development?

• A. A fast-loading website
• B. A website that responds to user input quickly
• C. A design that adapts to different screen sizes ✓
• D. A website with animations

💡 Responsive design uses flexible layouts so web pages look and function well on all devices and screen sizes.

11. What is a "framework" in programming?

• A. A type of database
• B. A pre-built structure that provides a foundation for building applications ✓
• C. A type of algorithm
• D. A hardware component

💡 A framework provides reusable code and structure to build applications faster. Examples: React, Django, Laravel.

12. What does "npm" stand for?

• A. Node Package Module
• B. New Programming Method
• C. Node Project Manager
• D. Node Package Manager ✓

💡 npm (Node Package Manager) is the default package manager for Node.js, used to install and manage JavaScript packages.

13. What is the purpose of an API?

• A. To design web pages
• B. To style HTML elements
• C. To store data permanently
• D. To allow different software applications to communicate ✓

💡 An API (Application Programming Interface) defines rules for how software components interact and share data.

14. Which SQL command retrieves data from a database?

• A. INSERT
• B. UPDATE
• C. DELETE
• D. SELECT ✓

💡 SELECT is used to retrieve data from a database: SELECT * FROM users WHERE age > 18.

15. What does "async/await" do in JavaScript?

• A. Creates a loop
• B. Handles asynchronous operations more cleanly ✓
• C. Defines a class
• D. Imports a module

💡 async/await is syntactic sugar over Promises, making asynchronous code easier to write and read.