Sign in Welcome! Log into your account your username your password Forgot your password? Get help Password recovery Recover your password your email A password will be e-mailed to you. HomeArenaQuiz #10 ArenaQuiz Quiz #10 By Coding Artist 2nd January 2023 0 744 Share Facebook Twitter Pinterest WhatsApp 201 Created by Coding Artist Quiz #10 1 / 10 let arr = [10, 20, 30, 40, 50];console.log(arr[arr.length]);What will the above code output to the console? 50 5 undefined Throws an error 2 / 10 if ([] || false) { console.log("Hi");}What will above code output to the console? Throws an error Hi null No Output 3 / 10 var arr = [1, 2, 3, 4];var res = arr.map(function (a, i) { return "a";});console.log(res);What will the above code output to the console? [1a, 2a, 3a, 4a] [1, 2, 3, 4] [a, a, a, a] ['a', 'a', 'a', 'a'] 4 / 10 if (null)console.log("Hello World");console.log("Hi");What will the above code output to the console? Hi No Output Hello World Throws an Error 5 / 10 let person = { name: "Mitali", a: 26,};var a = "name";console.log(person["a"]);What will the above code output to the console? Mitali age 26 name 6 / 10 let student = { name: "Jim", age: 12, score: 80,};console.log(Object.values(student)); 'Jim', 12, 80 name, age, score ['Jim', 12, 80] [name, age, score] 7 / 10 let person = { name: "Mitali", a: 26,};var a = "name";console.log(person[a]);What will the above code output to the console? Mitali name age 26 8 / 10 console.log([] && false);What will the above code output to the console? false [] Throws an error null 9 / 10 let num = 1.148;let val = num.toFixed(6);console.log(val);What will the above code output to the console? 1.2 1.1 1.148000 1.148 10 / 10 var a = 10;var a = 20;console.log(a);What will the above code output to the console? Throws an Error 20 1020 10 Your score is The average score is 44% LinkedIn Facebook Twitter VKontakte 0% Restart quiz Tagscss advanced quizjavascript quizjavascript quiz for beginnersquizquiz app javascriptquiz bank Share Facebook Twitter Pinterest WhatsApp Previous articleMCQ – 1/1/23Next articleGet File Name From File Input With Javascript Coding Artist RELATED ARTICLES Arena Javascript Quiz For Intermediates 24th July 2023 Arena Javascript Quiz For Beginners 16th July 2023 Arena MCQ – 10/2/23 10th February 2023 LEAVE A REPLY Cancel reply Comment: Please enter your comment! Name:* Please enter your name here Email:* You have entered an incorrect email address! Please enter your email address here Website: Save my name, email, and website in this browser for the next time I comment. Please enter an answer in digits:2 × 5 = Most Popular JavaScript Cheat Sheet – Free PDF Download 23rd May 2026 Build a Fun Balloon Pop Game Using HTML, CSS, and JavaScript 3rd July 2025 Build an Analog Clock with HTML, CSS, and JavaScript 3rd July 2025 Responsive Pricing Cards with Hover Effect Using HTML and CSS 2nd July 2025 Load more