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. 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.