JS Quiz (Easy Level) 0% 2 Report a question Table of Contents ToggleReport a questionLike this:Related 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 Which method stops setInterval? a. clearTimeout() b. clearInterval() c. endInterval() d. stopInterval() 2 / 30 Category: Easy Level Which symbol is used for arrow function? a. -> b. => c. <= d. == 3 / 30 Category: Easy Level Which statement handles errors? a. error-handle b. exception c. try-catch d. throw-error 4 / 30 Category: Easy Level Which function converts object to JSON? a. objectToJSON() b. toJSON() c. JSON.stringify() d. JSON.parse() 5 / 30 Category: Easy Level Which value represents no value? a. undefined b. null c. empty d. none 6 / 30 Category: Easy Level Which JavaScript runs on browser? a. Backend JS b. Database JS c. Server-side JS d. Client-side JS 7 / 30 Category: Easy Level Which keyword checks multiple conditions? a. else b. for c. if d. switch 8 / 30 Category: Easy Level undefined means a variable has been declared but not assigned a value. a. False b. True 9 / 30 Category: Easy Level Which method selects elements using CSS selector? a. querySelector() b. getSelector() c. selectElement() d. cssSelect() 10 / 30 Category: Easy Level 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. 11 / 30 Category: Easy Level Which operator negates condition? a. not b. != c. ~ d. ! 12 / 30 Category: Easy Level Which operator is logical OR? a. ! b. && c. || d. | 13 / 30 Category: Easy Level Which keyword exits function? a. stop b. return c. exit d. break 14 / 30 Category: Easy Level Which operator is logical AND? a. && b. ! c. || d. & 15 / 30 Category: Easy Level Which method takes user input? a. alert() b. prompt() c. input() d. confirm() 16 / 30 Category: Easy Level The const keyword allows reassignment of values. a. False b. True const variables cannot be reassigned. 17 / 30 Category: Easy Level Which keyword defines a function? a. def b. fun c. function d. method 18 / 30 Category: Easy Level Which object provides math operations? a. Number b. Arithmetic c. Calc d. Math 19 / 30 Category: Easy Level Which keyword throws error manually? a. stop b. throw c. error d. catch 20 / 30 Category: Easy Level isNaN("123") returns true. a. True b. False 21 / 30 Category: Easy Level Which function converts JSON to object? a. convertJSON() b. JSON.stringify() c. JSON.parse() d. parseJSON() 22 / 30 Category: Easy Level Which method shows confirmation dialog? a. message() b. alert() c. confirm() d. prompt() 23 / 30 Category: Easy Level Arrow functions have their own 'this' keyword. a. False b. True Arrow functions inherit this from the surrounding scope. 24 / 30 Category: Easy Level JavaScript can run without a browser using environments like Node.js. a. True b. False 25 / 30 Category: Easy Level Which method rounds a number? a. Math.round() b. all of these c. Math.floor() d. Math.ceil() 26 / 30 Category: Easy Level JavaScript can be used to manipulate HTML elements dynamically. a. False b. True This is done using DOM manipulation. 27 / 30 Category: Easy Level JavaScript is a case-sensitive language. a. True b. False myVar and myvar are treated as different identifiers. 28 / 30 Category: Easy Level JavaScript supports asynchronous programming. a. False b. True Using callbacks, promises, and async/await. 29 / 30 Category: Easy Level Which method sets a timer? a. setInterval() b. setTimeout() c. both a & b d. timer() 30 / 30 Category: Easy Level let variables are function-scoped. a. True b. False let is block-scoped, not function-scoped. 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 Days JavaScript Assignments for Beginners: Easy to Hard Practice Series | BittuTech May 17, 2026 30 JavaScript Questions Quiz December 29, 2025 Leave a ReplyCancel reply
