Questions

1. What keyword is used to unblock a thread inside async methods?
   1. async
   2. await
   3. Thread.Sleep
   4. Task
2. Which of the following are valid return types for async methods?
   1. void
   2. Task
   3. Task<T>
   4. IAsyncResult
3. TaskCompletionSource<T> can be used to implement a task-based async pattern manually.
   1. True
   2. False

4. Can we write Main methods as async?
   1. Yes
   2. No
5. Which property of the Task class can be used to check whether an exception has been thrown by an async method?
   1. IsException
   2. IsFaulted
6. We should always use void as a return type for async methods.
   1. True
   2. False