Kotlin Interview Questions & Assessment
Evaluate Kotlin skills including null safety, coroutines, extension functions, Jetpack Compose, and Android architecture.
Why Kotlin Matters
Kotlin is Google's preferred language for Android development and is growing rapidly in server-side development with Spring Boot. It offers modern features while maintaining full Java interoperability.
Sample Interview Questions
How does Kotlin handle null safety? Explain the safe call operator, Elvis operator, and non-null assertion.
Explain Kotlin coroutines. How do they differ from threads?
What are extension functions? How are they compiled under the hood?
Compare sealed classes, enum classes, and data classes. When would you use each?
How does Kotlin multiplatform work? What can and can't be shared across platforms?
How to Prepare
Understand null safety — it's Kotlin's defining feature
Master coroutines, flows, and structured concurrency
Know Jetpack Compose for modern Android UI development
Practice with extension functions, scope functions (let, run, apply, also)
Understand Kotlin's interop with Java and the JVM
Related Skills
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