Exam AZ-202 topic 14 question 1 discussion

Actual exam question from Microsoft's AZ-202

Question #: 1
Topic #: 14

HOTSPOT -
You need to configure retries in the LoadUserDetails function in the Database class without impacting user experience.
What code, should you insert on line DB07?
To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.
Hot Area:

Show Suggested Answer

Suggested Answer:

Box 1: Policy -

RetryPolicy retry = Policy -
.Handle<HttpRequestException>()
.Retry(3);
The above example will create a retry policy which will retry up to three times if an action fails with an exception handled by the Policy.
Box 2: WaitAndRetryAsync(3,i => TimeSpan.FromMilliseconds(100* Math.Pow(2,i-1)));
A common retry strategy is exponential backoff: this allows for retries to be made initially quickly, but then at progressively longer intervals, to avoid hitting a subsystem with repeated frequent calls if the subsystem may be struggling.
Example:

Policy -
.Handle<SomeExceptionType>()
.WaitAndRetry(3, retryAttempt =>
TimeSpan.FromSeconds(Math.Pow(2, retryAttempt))
);
References:
https://github.com/App-vNext/Polly/wiki/Retry

by oxaytol at June 17, 2020, 3:49 p.m.

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oxaytol

4 years, 11 months ago

Wrong answer selection, however explanation it is right, go to the explanation and check the correct answer for the second box: WaitAndRetryAsync(3,i => TimeSpan.FromMilliseconds(100* Math.Pow(2,i-1)));

upvoted 1 times

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