Kotlin Kotlin Coroutines 2

Question 1

What does calling `cancel()` on a Job do in Kotlin coroutines?

Accepted Answer

Cancels the coroutine and all its children

Answer

Calling `cancel()` on a `Job` requests cancellation of the coroutine and all coroutines launched in its scope.

Question 2

Which function suspends a coroutine for a given duration in Kotlin?

Accepted Answer

delay()

Answer

`delay()` is a suspending function that pauses a coroutine for a specified time without blocking the underlying thread.

Question 3

What is structured concurrency in Kotlin coroutines?

Accepted Answer

Ensuring child coroutines are scoped to a parent and cancelled together

Answer

Structured concurrency ensures that coroutines are launched within a defined scope, so child coroutines are automatically cancelled if the parent scope is cancelled.

Question 4

What is a Flow in Kotlin coroutines?

Accepted Answer

A cold asynchronous data stream that emits multiple values

Answer

A `Flow` is a cold asynchronous stream that emits multiple values sequentially, similar to Sequences but with suspend support.

Question 5

Which terminal operator collects all emitted values from a Flow?

Accepted Answer

collect()

Answer

`collect()` is a suspending terminal operator that collects all values emitted by a Flow and processes them.

Kotlin Practice Test

Kotlin Practice Test

Kotlin Kotlin Coroutines 2