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. let variables are function-scoped. a. False b. True let is block-scoped, not function-scoped. 2 / 30 Category: Easy Level 2. Which function converts JSON to object? a. parseJSON() b. JSON.stringify() c. convertJSON() d. JSON.parse() 3 / 30 Category: Easy Level 3. Which method takes user input? a. confirm() b. alert() c. prompt() d. input() 4 / 30 Category: Easy Level 4. Which statement handles errors? a. throw-error b. exception c. try-catch d. error-handle 5 / 30 Category: Easy Level 5. Which method rounds a number? a. all of these b. Math.round() c. Math.ceil() d. Math.floor() 6 / 30 Category: Easy Level 6. Which method stops setInterval? a. endInterval() b. clearTimeout() c. clearInterval() d. stopInterval() 7 / 30 Category: Easy Level 7. Which method shows confirmation dialog? a. alert() b. message() c. confirm() d. prompt() 8 / 30 Category: Easy Level 8. isNaN("123") returns true. a. True b. False 9 / 30 Category: Easy Level 9. Which operator is logical AND? a. || b. && c. ! d. & 10 / 30 Category: Easy Level 10. Which method selects elements using CSS selector? a. getSelector() b. querySelector() c. selectElement() d. cssSelect() 11 / 30 Category: Easy Level 11. The const keyword allows reassignment of values. a. False b. True const variables cannot be reassigned. 12 / 30 Category: Easy Level 12. Which JavaScript runs on browser? a. Database JS b. Backend JS c. Server-side JS d. Client-side JS 13 / 30 Category: Easy Level 13. Which method sets a timer? a. setTimeout() b. both a & b c. setInterval() d. timer() 14 / 30 Category: Easy Level 14. Which operator is logical OR? a. | b. ! c. || d. && 15 / 30 Category: Easy Level 15. Arrow functions have their own 'this' keyword. a. True b. False Arrow functions inherit this from the surrounding scope. 16 / 30 Category: Easy Level 16. Which keyword throws error manually? a. catch b. stop c. throw d. error 17 / 30 Category: Easy Level 17. JavaScript can run without a browser using environments like Node.js. a. False b. True 18 / 30 Category: Easy Level 18. 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. 19 / 30 Category: Easy Level 19. JavaScript supports asynchronous programming. a. True b. False Using callbacks, promises, and async/await. 20 / 30 Category: Easy Level 20. Which keyword checks multiple conditions? a. switch b. if c. else d. for 21 / 30 Category: Easy Level 21. Which function converts object to JSON? a. toJSON() b. JSON.stringify() c. objectToJSON() d. JSON.parse() 22 / 30 Category: Easy Level 22. Which keyword exits function? a. return b. stop c. exit d. break 23 / 30 Category: Easy Level 23. Which value represents no value? a. none b. null c. empty d. undefined 24 / 30 Category: Easy Level 24. JavaScript can be used to manipulate HTML elements dynamically. a. False b. True This is done using DOM manipulation. 25 / 30 Category: Easy Level 25. Which object provides math operations? a. Number b. Arithmetic c. Calc d. Math 26 / 30 Category: Easy Level 26. Which symbol is used for arrow function? a. == b. => c. <= d. -> 27 / 30 Category: Easy Level 27. Which keyword defines a function? a. method b. fun c. def d. function 28 / 30 Category: Easy Level 28. undefined means a variable has been declared but not assigned a value. a. False b. True 29 / 30 Category: Easy Level 29. Which operator negates condition? a. ! b. not c. ~ d. != 30 / 30 Category: Easy Level 30. JavaScript is a case-sensitive language. a. True b. False 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
