Coroutines Basics

1. What are coroutines in Kotlin?

Coroutines are a concurrency design pattern that allows you to write asynchronous code more easily and efficiently.

2. How do you launch a coroutine in Kotlin?

3. What is the difference between launch and async in coroutines?

launch is used for fire-and-forget tasks, while async is used for tasks that return a result.

4. Explain the purpose of suspend functions in coroutines.

suspend functions can be called from coroutines, and they can suspend execution without blocking the thread.

5. How do you define a suspend function in Kotlin?

6. What is the purpose of the CoroutineScope in coroutines?

CoroutineScope is used to control the lifecycle of coroutines and provides a structured concurrency mechanism.

7. How can you use structured concurrency in coroutines?

8. Explain the use of async and await for concurrent tasks in coroutines.

9. What is the purpose of the withContext function in coroutines?

withContext is used to switch the coroutine's context while keeping the same coroutine.

10. How can you handle exceptions in coroutines?

11. Explain the use of runBlocking in coroutines.

runBlocking is used to start a coroutine from a non-suspending function, providing a convenient way to write coroutine-based code in the main function.

12. What is the difference between launch and runBlocking in coroutines?

launch is used to launch a new coroutine without blocking the current thread, while runBlocking blocks the current thread until the coroutine inside it completes.

13. How can you cancel a coroutine in Kotlin?

14. What is the purpose of the CoroutineExceptionHandler in coroutines?

CoroutineExceptionHandler is used to handle uncaught exceptions in coroutines.

15. How can you use coroutines with Android development?

Android developers use coroutines to perform asynchronous operations, such as network requests or database access, without blocking the UI thread.

16. What is the purpose of yield in coroutines?

yield is used to suspend a coroutine and allow other coroutines to run. It's often used in scenarios where cooperative multitasking is needed.

17. How do you work with multiple coroutines concurrently in Kotlin?

18. Explain the concept of coroutine context and dispatchers.

Coroutine context represents the execution context of a coroutine, and dispatchers define the thread or threads on which coroutines are executed.

19. How can you ensure that coroutines are executed sequentially?

20. How do you use asynchronous coroutines for parallelism in Kotlin?