NSCT – Advanced JavaScript MCQs 20 min Score: 0 Attempted: 0/20 Subscribe 1. . Advanced JavaScript features include: (A) Only HTML structure (B) Only var and function (C) ES6+ syntax, promises, async/await, modules, and classes (D) Only CSS stylingShow All Answers 2. . ES6 arrow functions are preferred because: (A) They optimize CPU usage (B) They are slower than traditional functions (C) They only work in HTML (D) They provide concise syntax and preserve the this context 3. . JavaScript classes are used to: (A) Optimize CPU only (B) Style HTML elements (C) Structure CSS grids (D) Create objects with properties and methods using a blueprint 4. . Promises in JavaScript are used to: (A) Style elements dynamically (B) Handle asynchronous operations and avoid callback hell (C) Change HTML structure (D) Manage CPU usage 5. . The async keyword is used to: (A) Create CSS animations (B) Pause code execution (C) Declare an asynchronous function that returns a promise (D) Style HTML elements 6. . The await keyword is used to: (A) Add events to DOM elements (B) Create new objects (C) Style HTML elements (D) Wait for a promise to resolve inside an async function 7. . Template literals in JavaScript use: (A) Backticks ` for multi-line strings and variable interpolation (B) Single quotes ' ' only (C) Double quotes " " only (D) Curly braces { } only 8. . Destructuring in JavaScript is used to: (A) Optimize CPU (B) Remove elements from HTML (C) Style text (D) Extract values from arrays or objects into variables 9. . Default parameters in functions allow: (A) Declaring CSS properties (B) Specifying default values for parameters if not provided (C) Setting HTML attributes (D) Optimizing CPU 10. . The spread operator ... is used for: (A) Expanding arrays or objects into individual elements (B) Looping through arrays (C) Styling HTML (D) Declaring functions only 11. . The rest operator in function parameters is used to: (A) Remove HTML elements (B) Collect multiple arguments into an array (C) Style elements (D) Optimize CPU 12. . Modules in JavaScript allow: (A) Styling CSS (B) Organizing code into separate files with export and import (C) Structuring HTML (D) CPU optimization 13. . Closures in JavaScript: (A) Optimize CPU only (B) Are used to style elements (C) Allow functions to access variables from outer scopes even after outer function has executed (D) Structure HTML only 14. . The map() method in arrays: (A) Deletes array elements (B) Creates a new array by applying a function to each element (C) Styles elements (D) Changes object properties only 15. . The filter() method in arrays: (A) Optimizes CPU only (B) Changes CSS (C) Modifies DOM elements (D) Creates a new array containing elements that pass a test function 16. . The reduce() method in arrays: (A) Creates new objects only (B) Styles text (C) Deletes DOM elements (D) Reduces an array to a single value by applying a function cumulatively 17. . The Proxy object in JavaScript is used for: (A) Structuring HTML (B) Styling elements (C) Intercepting and customizing operations on objects (D) Optimizing CPU only 18. . The Set object in JavaScript: (A) Stores unique values of any type (B) Stores duplicate values only (C) Styles HTML elements (D) Structures CSS grids only 19. . The Map object in JavaScript: (A) Optimizes CPU only (B) Stores values only (C) Styles elements (D) Stores key-value pairs and preserves insertion order 20. . The ultimate goal of Advanced JavaScript is: (A) Only structure HTML (B) Build complex, modular, maintainable, and asynchronous web applications (C) Only style web pages (D) Optimize CPU only
