JavaScript debugging test: Pre-employment screening assessment to hire the best candidates

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JavaScript (coding): debugging test

Summary of the JavaScript (coding): debugging test

This JavaScript debugging test evaluates candidates’ ability to interpret JavaScript code and debug it according to a set of given requirements. The test gives candidates 30 minutes to read through requirements and fix a partially working script.

Covered skills

  • JavaScript debugging

Use the JavaScript (coding): debugging test to hire

JavaScript developers or any other role requiring practical experience in JavaScript.


Programming skills


30 min


English, Spanish, French, Italian, Japanese, Dutch, Portuguese



About the JavaScript (coding): debugging test

JavaScript is a flexible and powerful programming language that has been evolving very fast with the introduction of classes, generators, arrow functions, and many other features.

The ability to understand and debug code is a critical skill for a successful JavaScript developer. As new features are being developed for an application, bugs may be introduced into the code, and it is important for a developer to be able to identify and fix them. Given the collaborative nature of software development, it is also critical for developers to be able to work with and correct the code of others.

This test gives candidates a small script that contains one or more bugs. The description clarifies the objective of the code and provides examples to illustrate how it should function. Candidates must identify and fix the bugs.

We recommend combining this coding test with other programming tests such as Angular, React, Vue.js, Node.js, and SQL, as well as our tests on critical thinking and numerical reasoning.

The test is made by a subject-matter expert

Bereket G.

Take a bachelor’s degree in electrical and computer engineering, combine it with a mastery of HTML, JavaScript, and PHP, and add international experience in web and software development, and you’ve got Bereket. When asked what really makes him tick, Bereket describes his passion for developing web apps from scratch—from back-end REST services to front-end user interfaces.

On top of his professional ingenuity, Bereket boasts polyglot status, with skills in Amharic, English, German, and Spanish.

Crafted with expert knowledge

TestGorilla’s tests are created by subject matter experts. We assess potential subject-matter experts based on their knowledge, ability, and reputation. Before being published, each test is peer-reviewed by another expert, then calibrated using hundreds of test takers with relevant experience in the subject. Our feedback mechanisms and unique algorithms allow our subject-matter experts to constantly improve their tests.

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Review from G2

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View a sample report

The JavaScript (coding): debugging test will be included in a PDF report along with the other tests from your assessment. You can easily download and share this report with colleagues and candidates.


What is a JavaScript coding/debugging test? How will it help you?

An online JavaScript coding/debugging skills test is a pre-employment skills assessment that helps you evaluate your candidates’ debugging skills in JavaScript. Our JavaScript debugging experts have created this test to help you hire the best JavaScript debugging talent in a faster and bias-free manner.

If you’ve been considering various options to evaluate your applicants’ JavaScript debugging skills, you can stop searching. This JavaScript debugging skills test is a comprehensive method for assessing essential debugging skills in JavaScript.

There are several reasons JavaScript debugging subskills are vital for developers. If your next hire can debug code efficiently, they can help mitigate the losses your organization may face if it releases software with bugs.

A skilled JavaScript professional who knows how to debug software code can enhance your company’s reputation, save time in the software development process, and improve the overall quality of an application’s code.

Finding the right professional JavaScript professional isn’t easy: You’ll face several challenges during the recruitment process.

Hiring objectively, ensuring your applicants have the right debugging subskills and soft skills, coming to a unanimous decision when hiring a candidate, and hiring a JavaScript debugging professional as a recruiter who lacks JavaScript skills are just a few examples.

Given these challenges, how can you avoid mis-hiring and keep time-to-hire metrics low?

There are multiple advantages to using this JavaScript debugging skills test after sourcing applicants. The test will make candidate assessment easier and instantly show you the most skilled applicants who stand above the rest.

This JavaScript online test shows you candidates’ results in the form of percentages that reflect your applicants’ knowledge and skills. This makes it easy to compare candidates to determine who is the most proficient at JavaScript debugging.


Evaluate the 4 essential JavaScript debugging skills

This JavaScript skills test is ideal for assessing technical debugging skills in JavaScript. If you’re looking for a way to evaluate all the most important JavaScript debugging subskills, this is the test you need. It will help you assess four critical debugging subskills, namely candidates’ ability to:

Identify bugs in JavaScript code: Use this JavaScript debugging skills test to evaluate how well your applicants can identify bugs in JavaScript code. Some of the additional skills you can test with this assessment include the ability to check for punctuation errors, unclosed character strings, and misspelled variables.

Understand the code’s main function and use comments: This JavaScript online test for debugging will assess whether your candidate can use the description provided to understand the main function of the code. It also shows you how confidently candidates can use comments to help with the debugging process.

Fix bugs in JavaScript code: Use our JavaScript test to find out whether applicants can determine the type of bug they’re dealing with and fix it by using iterative methods to change the code in stages. The test enables you to examine your applicants’ bug-fixing process and evaluate their ability to avoid making vague changes based on instinct.

Find solutions for bugs within a time limit: The test is timed so that you can see how efficiently your applicants debug JavaScript code against the clock. Find out if your applicants can fix a bug by a given deadline with our JavaScript online test.


Use this JavaScript debugging test to assess mid-level developers

The JavaScript debugging skills test removes numerous difficulties from the hiring process. Choose our JavaScript test to make hiring JavaScript easier in the following ways:

Assess developers even if you don’t have JavaScript knowledge: If you’re an HR staff member or recruiter without JavaScript debugging skills, it could be challenging to evaluate applicants applying for a mid-level or advanced JavaScript debugging position.

This is no problem when you use this JavaScript debugging skills test to assess applicants’ JavaScript debugging skills and knowledge. Backed with our expert-crafted tests, you’ll be able to assess JavaScript developers’ skills with minimal stress.

Keep hiring costs low: Compare applicants in an instant: The faster you hire a JavaScript developer with debugging expertise, the shorter your hiring process will be, and the less you’ll have to dip into your recruitment budget.

Our JavaScript online test for debugging will reduce your hiring expenses by helping you make quick and reliable hiring decisions. Avoid mis-hiring and long hiring periods, and hire quickly and efficiently to keep recruitment costs low.

Combine the JavaScript online test for debugging with other skills tests: TestGorilla enables you to combine the JavaScript debugging test with various other skills tests.

It’s also critical to assess applicants’ soft skills, including written communication for leaving comments, team collaboration, time management for meeting milestones, and problem-solving for debugging code efficiently. To evaluate all of these abilities, consider giving candidates a comprehensive skills assessment that features various skills tests.

Our JavaScript online test for debugging is just one of the 238 pre-employment tests the TestGorilla platform offers. These tests are used by 5,800 businesses around the world, including Oracle. Do you want to know why our tests are the preferred choice for hiring candidates? Use the JavaScript debugging test to find out.


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