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 AnswersShow 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 contextShow All Answers 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 blueprintShow All Answers 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 usageShow All Answers 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 elementsShow All Answers 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 functionShow All Answers 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 { } onlyShow All Answers 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 variablesShow All Answers 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 CPUShow All Answers 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 onlyShow All Answers 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 CPUShow All Answers 12. . Modules in JavaScript allow: (A) Styling CSS (B) Organizing code into separate files with export and import (C) Structuring HTML (D) CPU optimizationShow All Answers 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 onlyShow All Answers 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 onlyShow All Answers 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 functionShow All Answers 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 cumulativelyShow All Answers 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 onlyShow All Answers 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 onlyShow All Answers 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 orderShow All Answers 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 onlyShow All Answers
