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