Check our public questions below
Solve questions to get feedback or
take a practice test and get a free certificate.
Solve questions to get feedback or
take a practice test and get a free certificate.
Work-samples are the best predictor of work performance. 8,000+ companies use TestDome premium questions.
The JavaScript online test assesses candidates' knowledge of programming in the JavaScript language and its main application, Web front-end development.
It's an ideal test for pre-employment screening. A good JavaScript developer needs to be able not only to solve problems using JavaScript as the programming language but also to understand its specifics, such as prototypes, closures, event loop, and variable scope.
This online test requires candidates to solve coding problems in JavaScript and find and fix bugs in JavaScript programs.
Implement the ensure function so that it throws an error if called without arguments or the argument is undefined. Otherwise it should return the given value.
A Mathematics tutoring web application for kids has a button that highlights all even numbers (in span), using 'yellow' as the background color. Clicking the button again removes the background. All further clicks add or remove the 'yellow' background alternately.
Currently, the button doesn't work as expected. For the given HTML markup and JavaScript function, select all options that will identify and fix the bugs in the JavaScript function:
<div id='numbers'>
<span>1</span><span>2</span><span>3</span><span>4</span><span>5</span>
<button id='btn' onclick='toggleEvenColor()'>Toggle even number highlighting</button>
</div>
1: function toggleEvenColor() {
2: let spanElements = document.querySelectorAll('#numbers span');
3: spanElements.forEach(function() {
4: item.style.backgroundColor = 'transparent';
5: });
6: }
Earn a free certificate by achieving top 25% on the JavaScript test with public questions.
Take a Certification TestKera Lafleur
Java and SQL
TestDome
Certificate
Buy TestDome to access premium questions that can't be practiced.
Get money back if you find any premium question answered online.
Positive Numbers, Truthy Expressions, Max Sum, Launch Time, Function Wrapper, Log Parser, Unique Numbers, Load URL, Photon Frequency, Trading Data Paging, Color Codes, Tax Calculator, Confirm, Friend, Memory Game, New Folder, Post Comment, Row Appender, Vectors, Segment, Special Actions, Height, Product Rating, Validation, Cards, Array Search, Screen, Timer, Username, Snapshot, Scale Font Size, Products, Paragraph, Hide Button, A Tag, Hobbies, Loading Bar, Log Patch, Double, Table of Names, Filter, Reorder, Date Transform.
From web development and database administration to project management and customer support. See all pre-made tests.
From JavaScript and SQL to English and customer support. See all questions to filter by skill.
Mix questions for different skills or even custom questions in one test. See an example.