Kotlin skills test: Pre-employment screening assessment to hire the best developers

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Kotlin (Coding): Working with Arrays test

Summary of the Kotlin (Coding): Working with Arrays test

This Kotlin Coding test evaluates candidates’ ability to work with arrays. The test gives candidates 30 minutes to create a short algorithm involving arrays while taking into consideration all the requirements provided.

Covered skills

  • Working with Arrays

Use the Kotlin (Coding): Working with Arrays test to hire

Android developers, mobile developers, and any other roles requiring knowledge of working with arrays in Kotlin.


Programming skills


20 min




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About the Kotlin (Coding): Working with Arrays test

Kotlin is a cross-platform coding language designed to interoperate fully with Java. Kotlin has been the preferred language for Android app developers since 2019. Good Kotlin developers are therefore highly sought after.

One of the skills required of good Kotlin developers is working with arrays. Arrays are special variables that hold collections of related values. Arrays allow developers to work with a large number of variables quickly and efficiently.

This test assesses candidates’ skills in working with Kotlin arrays. The test provides candidates with a task description in the appropriate context and specifies the algorithms that need to be developed and the requirements to satisfy. It also provides a few examples to illustrate how the function should behave and asks candidates to solve the task. You can see a complete and functional example of a task by clicking the “preview questions” tab on this page.

Candidates can run their code to see if certain pre-defined inputs return the expected result. The test is scored automatically using a different set of test cases, which include more challenging corner cases. Once the test is complete, you can inspect the code of the candidate and play it back to interpret their thought process. You can also see the efficiency of the code shown in the results.

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The test is made by a subject-matter expert

Suneet A.

Suneet is a non-caffeine-addicted developer who holds an MSc in Video Game Development from Birmingham City University and works as Director of Engineering for a payroll management app in Bangalore, India. Suneet’s career spans 10 years of industry experience in native Android, native iOS, Web (React native), Backend (Node JS and TS) and Game Development targeting mobile and PlayStation. Suneet is passionate about gaming and animation.

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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