Exam 70-486 topic 1 question 110 discussion

Actual exam question from Microsoft's 70-486

Question #: 110
Topic #: 1

Customers download videos by using HTTP clients that support various content encodings.
You need to configure caching on the DownloadVideo action to maximize performance.
Which attribute should you add?

A. Option A
B. Option B
C. Option C
D. Option D
E. Option E

Show Suggested Answer

Suggested Answer: E 🗳️
A VaryByParam property with the value "VideoId". When different values of the Id parameter are passed to the controller action, different cached versions of the
Details view are generated.
It is important to understand that using the VaryByParam property results in more caching and not less. A different cached version of the Details view is created for each different version of the Id parameter.
You can set the VaryByParam property to the following values:
* = Create a different cached version whenever a form or query string parameter varies. none = Never create different cached versions
Semicolon list of parameters = Create different cached versions whenever any of the form or query string parameters in the list varies
References:
https://docs.microsoft.com/en-us/aspnet/mvc/overview/older-versions-1/controllers-and-routing/improving-performance-with-output-caching-cs https://msdn.microsoft.com/en-us/library/system.web.mvc.outputcacheattribute_properties(v=vs.118).aspx

by arohh at Jan. 12, 2021, 7:20 p.m.

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arohh

4 years, 5 months ago

I think answer E is right, because you have to cache every video individually. Therefore, "videoId" param is needed for distinguishing videos

upvoted 1 times

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