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21 interview questions on Kotlinfor developers (2024)

Test your technical skills before an interview of Kotlin with 21 corrected questions. Beginner, Intermediate or Expert level.

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21 questions
Hard
7 votes698 runs0 comment

How to flatten a list of lists in Kotlin

Anonymous authorat Jan 18, 2022
Easy
4 votes640 runs0 comment
Easy
4 votes638 runs1 comment
Hard
3 votes551 runs0 comment

Write a Kotlin program that evaluates an arithmetic expression.

Mobile developer
kotlin
data class
sealed class
Anonymous authorat Jan 18, 2022
Medium
2 votes526 runs0 comment

Print the value of a nullable string in Kotlin

Mobile developer
kotlin
null-safety
Anonymous authorat Jan 18, 2022
Easy
2 votes524 runs1 comment
Hard
2 votes521 runs1 comment

How to add a new element to a list of Kotlin data class

Mobile developer
kotlin
data class
inheritance
Anonymous authorat Jan 18, 2022
Expert
1 vote682 runs0 comment
Hard
1 vote566 runs0 comment

Use destructuring to extract the name and age of a User object

Mobile developer
data class
destructuring
Anonymous authorat Jan 18, 2022
Medium
1 vote551 runs0 comment

Convert an Int to a Long in Kotlin

Mobile developer
kotlin
type conversion
Anonymous authorat Jan 18, 2022
Medium
1 vote529 runs0 comment

Write a Kotlin code that prints 7 to the console.

Mobile developer
list
filter
drop
Anonymous authorat Jan 18, 2022
Medium
1 vote523 runs0 comment
Hard
0 vote526 runs0 comment

Add a secondary constructor to a Kotlin class

Mobile developer
constructors
inheritance
Anonymous authorat Jan 18, 2022
Medium
0 vote384 runs0 comment

Write a valid call to the function reformat in Kotlin 1.3

Mobile developer
functions
parameters
Anonymous authorat Jan 18, 2022
Easy
0 vote19 runs0 comment