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Kotlin Online Test
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Kotlin Online Test

iMocha's Kotlin online test is the ideal pre-hire test for recruiters and hiring managers to assess candidates objectively. It enables hiring managers to evaluate candidates' expertise for  job roles like Android Kotlin Developer, Android Developer- Kotlin, Java Developer, and Mobile Developer. Additionally, using the Kotlin developer test recruiters can increase the interview-to-selection ratio by 62%.

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Kotlin Online Test

Kotlin is a programming language introduced by JetBrains, the official designer of the most intelligent Java IDE, named IntelliJ IDEA. Kotlin is a cross-platform, statically typed, general-purpose programming language with type inference. Apart from Java, the most strongly supported JVM language in the Android ecosystem is Kotlin. It is designed to interoperate fully with the Java platform, and the JVM version of its standard library mainly depends on the Java Class Library. Kotlin also uses libraries for Android and browsers.

Online Kotlin developer assessment on Kotlin 1.3 M2 helps recruiters and hiring managers to assess candidates’ Kotlin programming skills.

Why use iMocha’s Kotlin test?

This Kotlin test helps employers in many ways, including hiring a job-fit candidate quickly, making unbiased employee performance appraisal decisions, and reducing hassle in mass recruitment. Additionally, using this online test you can reduce your hiring efforts by up to 40%.

Two important use cases for Kotlin online test

#1 Identifying job-fit candidates based on job roles

iMocha enables you to create customized Kotlin developer tests for any given job role. Using this capability, you can choose questions from various skill types, including functional, technical, and soft skills. For example, with our customized Kotlin assessment, you can evaluate candidates’ knowledge of Logical Operations, Access Modifiers, Design Principles, Analytical Thinking, and more to hire the best individuals for the job.

#2 Skill-gap analysis of your employees

Using this feature, you can measure employees' skill competency through Kotlin training assessments. It determines the current skill level and identifies the areas for growth. It also measures the knowledge and impact of the training and traces individual employees’ gained knowledge. For example, you can use our Kotlin training assessments to identify a consultant’s knowledge about MVP, JUnits, Type Casting, Communication, and other skills and perform a skill gap analysis.

Wondering what other skills we have in our World’s Largest Skills Assessment library?
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How it works

Test Summary

The Kotlin developer test helps to identify individuals who have the common attributes:

  • Proficient with Kotlin programming language
  • Strong knowledge of Android SDK, different versions of Android Experience, and a basic understanding of developing Apps for the Android OS
  • Good command of Android UI design principles, patterns, and best practices.

You can also request us to create a customized test for the latest version of Kotlin.

Recruiters can use intelligent and powerful Test Insights feature such as score distribution and section analysis features to identify job-fit candidates accurately.

Useful for hiring
  • Android Kotlin Devloper
  • Android Developer - Java / Kotlin
  • Java Developer
  • Mobile Developer
Test Duration
No. of Questions
Level of Expertise
Topics Covered

Compilation Variable

Our Kotlin test helps recruiters and hiring managers to evaluate candidate's knowledge about variables in Kotlin by which memory is allocated to store data.

When Expression

iMocha’s Kotlin skills test evaluates candidates' knowledge about expressions used in Kotlin, which can be used as statements or as expressions.

Type Casting

This Kotlin coding test evaluates the candidate’s ability to work with typecasting, in which one data type can be converted into another.

Logical Operator

This test evaluates candidate’s knowledge of logical operators which returns Boolean values such as true or false.

Exception in Kotlin

This test helps recruiters to assess the candidate's understanding about handling runtime problems which may occur in programs and result in program termination.

Access Modifier

This test assesses the candidate's knowledge about access modifiers which are used to set the visibility of classes, interfaces, variables, methods, constructions, etc.
Sample Question
Choose from our 100,000+ questions library or add your own questions to make powerful custom tests.
Question type
Multiple Option
Topics covered


Kotlin allows asynchronism by the use of Coroutines. A Coroutine is an asynchronous code that runs in a separated thread. For instance:

import kotlinx.coroutines.*

fun main() {
    GlobalScope.launch {
    println ("0")
    println("1, 2, 3")
    println("4, 5, 6")

What is printed on the console output after the code above is executed?


  • 01, 2, 34, 5, 69
  • 4, 5, 69, 01, 2, 3
  • 4, 5, 60, 1, 2, 39
  • 04, 5, 61, 2, 39
  • 1, 2, 30, 4, 5, 69
A helicopter view of the employee's progress
Test Report
You can customize this test by

Setting the difficulty level of the test

Choose easy, medium, or tricky questions from our skill libraries to assess candidates of different experience levels.

Combining multiple skills into one test

Add multiple skills in a single test to create an effective assessment and assess multiple skills together.

Adding your own
questions to the test

Add, edit, or bulk upload your coding, MCQ, and whiteboard questions.

Requesting a tailor-made test

Receive a tailored assessment created by our subject matter experts to ensure adequate screening.
How is Kotlin online test customized?
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Our SMEs can create individualized Kotlin skills tests based on your job role requirements. These assessments are divided into primary and secondary skills, such as a Single view of Lambda Expression, MVVM, Exception in Kotlin, Attention to Detail, and more. Additionally, SMEs can design customized questions according to applicants' experience and difficulty level.

Curious about hiring Kotlin developers for your app development project? Explore this comprehensive guide to secure the best Kotlin developers for your needs.

What are the certifications required for this role?
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Some popular Certifications for Kotlin-related job roles are as follows:

• Oracle Certified Professional, Kotlin Developer

• JetBrains Certified Kotlin Developer

• Google Certified Professional Android Developer

• Android Kotlin Developer Certification

• Android Kotlin Fundamentals Certification

• Kotlin Expert Certification

• Kotlin Android Developer Certification

• Kotlin Certified Professional Programmer

• Kotlin Certified Associate Programmer

• Kotlin Programming Language Certification

What are the most common interview questions for this role?
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Some of the common Kotlin interview questions asked for this role are:

• How are variables declared in Kotlin? What are the different types of variables in Kotlin? Explain with examples.

• What are data classes in Kotlin? Explain with a proper example.

• Explain the concept of null safety in Kotlin.

• Explain Safe call, Elvis and Not Null Assertion operator in the context of Kotlin.

• What are the different types of constructors available in Kotlin? Explain them with proper examples.

• How can you concatenate two strings in Kotlin?

• Explain about the “when” keyword in the context of Kotlin.

• What is basic difference between fold and reduce in Kotlin? When to use which?

• Where should I use Var and where Val?

• How is a function declared? Why are Kotlin functions known as top-level functions?

What are the roles and responsibilities of a Kotlin Developer?
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Kotlin Developers are required to perform the following tasks and responsibilities:

• Use the Kotlin programming language to create software apps.

• Create, debug, and support Kotlin apps.

• Refactor and optimize existing code.

• Create and deploy APIs and libraries.

• Investigate and create new features.

• Work with other developers and designers to create something unique.

• Provide technical assistance and troubleshooting.

• Keep up with the latest advancements in the Kotlin programming language.

• Unit tests must be created and maintained.

• Keep an eye on performance and report any problems.

Discover the Kotlin Developer job description to understand roles and responsibilities. Begin attracting top talent today!

What are the required skill sets of a Kotlin Developer?
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You can consider these technical as well as non-technical skills while hiring Kotlin Developers:

Technical Skills:

• Kotlin programming language

• Android development environment

• Kotlin design patterns

• Experience with Android SDKs, APIs, and other libraries

• Git

• Mobile application architectures

• Android Studio development environment

• Debugging Kotlin code

• Type casting

• Lambda expressions

• Access modifiers

Non-Technical Skills:

• Organizational Skills

• Problem-solving Skills

• Analytical Thinking

• Communication Skills

• Time management Skills

• Collaboration

• Attention to Detail

What is the package of Kotlin Developer?
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In the United States, the average Kotlin Developer’s salary is $1,30,000 per year. Kotlin Developers’ salaries start at $108,000 per year.