JS Quiz (Easy Level) 0% 2 Report a question Table of Contents ToggleReport a questionLike this: What's wrong with this question? You cannot submit an empty report. Please add some details. Oops! Times Up! JavaScript (JS) JS Quiz for beginners (Level- Easy) Click on Start Button ! Login Form. NameEmail 1 / 30 Category: Easy Level 1. The const keyword allows reassignment of values. a. False b. True const variables cannot be reassigned. 2 / 30 Category: Easy Level 2. Which operator negates condition? a. != b. ~ c. ! d. not 3 / 30 Category: Easy Level 3. Which method takes user input? a. confirm() b. input() c. prompt() d. alert() 4 / 30 Category: Easy Level 4. Which operator is logical AND? a. ! b. || c. && d. & 5 / 30 Category: Easy Level 5. Which method stops setInterval? a. clearInterval() b. stopInterval() c. endInterval() d. clearTimeout() 6 / 30 Category: Easy Level 6. Which method rounds a number? a. Math.round() b. Math.floor() c. all of these d. Math.ceil() 7 / 30 Category: Easy Level 7. JavaScript can be used to manipulate HTML elements dynamically. a. False b. True This is done using DOM manipulation. 8 / 30 Category: Easy Level 8. Which keyword throws error manually? a. throw b. error c. catch d. stop 9 / 30 Category: Easy Level 9. Which function converts JSON to object? a. convertJSON() b. JSON.parse() c. JSON.stringify() d. parseJSON() 10 / 30 Category: Easy Level 10. let variables are function-scoped. a. False b. True let is block-scoped, not function-scoped. 11 / 30 Category: Easy Level 11. Which method shows confirmation dialog? a. confirm() b. alert() c. message() d. prompt() 12 / 30 Category: Easy Level 12. isNaN("123") returns true. a. True b. False 13 / 30 Category: Easy Level 13. Which statement handles errors? a. exception b. throw-error c. try-catch d. error-handle 14 / 30 Category: Easy Level 14. Which method sets a timer? a. timer() b. setInterval() c. setTimeout() d. both a & b 15 / 30 Category: Easy Level 15. NaN stands for “Not a Number” and its data type is number. a. False b. True Although it means “Not a Number”, typeof NaN is number. 16 / 30 Category: Easy Level 16. Which method selects elements using CSS selector? a. selectElement() b. querySelector() c. cssSelect() d. getSelector() 17 / 30 Category: Easy Level 17. Which JavaScript runs on browser? a. Server-side JS b. Database JS c. Client-side JS d. Backend JS 18 / 30 Category: Easy Level 18. Which object provides math operations? a. Calc b. Arithmetic c. Math d. Number 19 / 30 Category: Easy Level 19. JavaScript supports asynchronous programming. a. False b. True Using callbacks, promises, and async/await. 20 / 30 Category: Easy Level 20. Which keyword defines a function? a. fun b. method c. function d. def 21 / 30 Category: Easy Level 21. Which operator is logical OR? a. | b. || c. ! d. && 22 / 30 Category: Easy Level 22. undefined means a variable has been declared but not assigned a value. a. True b. False 23 / 30 Category: Easy Level 23. Arrow functions have their own 'this' keyword. a. False b. True Arrow functions inherit this from the surrounding scope. 24 / 30 Category: Easy Level 24. Which value represents no value? a. undefined b. empty c. none d. null 25 / 30 Category: Easy Level 25. Which keyword exits function? a. break b. exit c. stop d. return 26 / 30 Category: Easy Level 26. Which keyword checks multiple conditions? a. if b. switch c. for d. else 27 / 30 Category: Easy Level 27. JavaScript can run without a browser using environments like Node.js. a. True b. False 28 / 30 Category: Easy Level 28. Which function converts object to JSON? a. objectToJSON() b. JSON.stringify() c. toJSON() d. JSON.parse() 29 / 30 Category: Easy Level 29. Which symbol is used for arrow function? a. == b. <= c. => d. -> 30 / 30 Category: Easy Level 30. JavaScript is a case-sensitive language. a. False b. True myVar and myvar are treated as different identifiers. Your score is 0% Restart quiz Rate Us ! Thank You for Your Love ! Send feedback Like this:Like Loading...Share post Please Share This Share this content Opens in a new window Opens in a new window Opens in a new window Opens in a new window Read more articles Previous Post30 JavaScript Questions Quiz Prajjwal Singh Tech Blogger || Web developer || Computer Networking Enthusiast || Microsoft SQL Database Management Expert || Software Debugger || Learned DOS OS Structure You Might Also Like 30 JavaScript Questions Quiz December 29, 2025 Leave a ReplyCancel reply
