Exam 70-483 topic 3 question 2 discussion

Actual exam question from Microsoft's 70-483

Question #: 2
Topic #: 3

You use the Task.Run() method to launch a long-running data processing operation. The data processing operation often fails in times of heavy network congestion.
If the data processing operation fails, a second operation must clean up any results of the first operation.
You need to ensure that the second operation is invoked only if the data processing operation throws an unhandled exception.
What should you do?

A. Create a task within the operation, and set the Task.StartOnError property to true.
B. Create a TaskFactory object and call the ContinueWhenAll() method of the object.
C. Create a task by calling the Task.ContinueWith() method.
D. Use the TaskScheduler class to create a task and call the TryExecuteTask() method on the class.
E. Create a TaskCompletionSource<T> object and call the TrySetException() method of the object.
F. Examine the Task.Status property immediately after the call to the Task.Run() method.
G. Create a task inside the existing Task.Run() method by using the AttachedToParent option.

Show Suggested Answer

Suggested Answer: C 🗳️
Task.ContinueWith - Creates a continuation that executes asynchronously when the target Task completes. The returned Task will not be scheduled for execution until the current task has completed, whether it completes due to running to completion successfully, faulting due to an unhandled exception, or exiting out early due to being canceled.
References:
http://msdn.microsoft.com/en-us/library/dd270696.aspx

by josuke at May 9, 2020, 2:01 a.m.

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Dmn28

4 years, 8 months ago

ContinueWith() method examines the Task.Status under hood. So correct should be F.

upvoted 2 times

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soats

4 years, 9 months ago

These questions which doesn't have image are probably plain brain dump meaning someone probably forgotten whole signature. C would be correct with the TaskContinuationOptions. F is correct regardless.

upvoted 2 times