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