JS Quiz (Easy Level) 0% 2 Report a question 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. Which JavaScript runs on browser? a. Client-side JS b. Server-side JS c. Backend JS d. Database JS 2 / 30 Category: Easy Level 2. Which keyword throws error manually? a. throw b. catch c. error d. stop 3 / 30 Category: Easy Level 3. Which method shows confirmation dialog? a. alert() b. prompt() c. confirm() d. message() 4 / 30 Category: Easy Level 4. Which method rounds a number? a. Math.floor() b. Math.round() c. Math.ceil() d. all of these 5 / 30 Category: Easy Level 5. undefined means a variable has been declared but not assigned a value. a. True b. False 6 / 30 Category: Easy Level 6. JavaScript can run without a browser using environments like Node.js. a. True b. False 7 / 30 Category: Easy Level 7. Which keyword exits function? a. return b. exit c. stop d. break 8 / 30 Category: Easy Level 8. NaN stands for “Not a Number” and its data type is number. a. True b. False Although it means “Not a Number”, typeof NaN is number. 9 / 30 Category: Easy Level 9. isNaN("123") returns true. a. False b. True 10 / 30 Category: Easy Level 10. Which symbol is used for arrow function? a. <= b. => c. -> d. == 11 / 30 Category: Easy Level 11. Which operator is logical OR? a. || b. ! c. | d. && 12 / 30 Category: Easy Level 12. Which function converts object to JSON? a. JSON.parse() b. toJSON() c. JSON.stringify() d. objectToJSON() 13 / 30 Category: Easy Level 13. The const keyword allows reassignment of values. a. True b. False const variables cannot be reassigned. 14 / 30 Category: Easy Level 14. Arrow functions have their own 'this' keyword. a. False b. True Arrow functions inherit this from the surrounding scope. 15 / 30 Category: Easy Level 15. Which operator negates condition? a. not b. ! c. ~ d. != 16 / 30 Category: Easy Level 16. Which keyword checks multiple conditions? a. else b. switch c. for d. if 17 / 30 Category: Easy Level 17. let variables are function-scoped. a. True b. False let is block-scoped, not function-scoped. 18 / 30 Category: Easy Level 18. JavaScript supports asynchronous programming. a. True b. False Using callbacks, promises, and async/await. 19 / 30 Category: Easy Level 19. Which value represents no value? a. none b. undefined c. empty d. null 20 / 30 Category: Easy Level 20. Which statement handles errors? a. throw-error b. exception c. error-handle d. try-catch 21 / 30 Category: Easy Level 21. Which method sets a timer? a. timer() b. setTimeout() c. both a & b d. setInterval() 22 / 30 Category: Easy Level 22. Which function converts JSON to object? a. parseJSON() b. convertJSON() c. JSON.stringify() d. JSON.parse() 23 / 30 Category: Easy Level 23. Which method selects elements using CSS selector? a. cssSelect() b. querySelector() c. getSelector() d. selectElement() 24 / 30 Category: Easy Level 24. Which keyword defines a function? a. fun b. method c. def d. function 25 / 30 Category: Easy Level 25. Which operator is logical AND? a. ! b. & c. && d. || 26 / 30 Category: Easy Level 26. JavaScript can be used to manipulate HTML elements dynamically. a. True b. False This is done using DOM manipulation. 27 / 30 Category: Easy Level 27. JavaScript is a case-sensitive language. a. True b. False myVar and myvar are treated as different identifiers. 28 / 30 Category: Easy Level 28. Which method stops setInterval? a. clearTimeout() b. endInterval() c. clearInterval() d. stopInterval() 29 / 30 Category: Easy Level 29. Which method takes user input? a. confirm() b. alert() c. input() d. prompt() 30 / 30 Category: Easy Level 30. Which object provides math operations? a. Arithmetic b. Math c. Number d. Calc Your score is 0% Restart quiz Rate Us ! Thank You for Your Love ! Send feedback Share this: Share on Facebook (Opens in new window) Facebook Share on X (Opens in new window) X Like this:Like Loading… Related 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 Next Post30 Days JavaScript Assignments for Beginners: Easy to Hard Practice Series | BittuTech 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 30 Days JavaScript Assignments for Beginners: Easy to Hard Practice Series | BittuTech May 17, 2026 Leave a ReplyCancel reply
