JavaScript Online Test

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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.

Recommended Job Roles

JavaScript Developer

Web Front-End Developer

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Sample Free Questions

Ensure

3min

Easy

CODE

JavaScript Language Public

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.

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Remove Property

7min

Easy

CODE

JavaScript Language Public

Implement the removeProperty function which takes an object and property name, and does the following:

If the object obj has a property prop, the function removes the property from the object and returns true; in all other cases it returns false.

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Date

10min

Easy

CODE

JavaScript Strings Public

Write a function that converts user entered date formatted as M/D/YYYY to a format required by an API (YYYYMMDD). The parameter "userDate" and the return value are strings.

For example, it should convert user entered date "12/31/2014" to "20141231" suitable for the API.

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Questions

Filter, Stopwatch, Height, Positive Numbers, Paragraph, Post Comment, Row Appender, Hobbies, Vectors, Username, Function Wrapper, Anchors, Confirm, Double, Reorder, Hide Button, Truthy Expressions, Array Search, Product Rating, Products, Snapshot, Table of Names, Word Count, Log Parser, Date Transform, Cards, Scale Font Size, New Folder, Screen, Log Patch, Segment, Loading Bar, Validation

Skills

JavaScript Arrays Closures Arithmetic Language Strings DOM manipulation Event handling Iteration Searching Exceptions Recursion Serialization Sorting Styling Bug fixing Classes ECMAScript 2015 Monkey Patching HTML5

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Easy to use and efficient for testing developers of different levels

It provides us an opportunity to set our own timing policy, to choose from variety of questions from different areas and with difficulty gradation. Also it is great that TestDome provides free of charge tests for candidates to prepare and check how online IDE works. And support is always ready to help:)

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