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Question 17/70

For this question, refer to the Mountkirk Games case study.
Mountkirk Games' gaming servers are not automatically scaling properly. Last month, they rolled out a new feature, which suddenly became very popular. A record number of users are trying to use the service, but many of them are getting 503 errors and very slow response times. What should they investigate first?

Recent Comments (The most recent comments are at the top.)

Mr. Guido - Nov 28, 2018

I&#39;d say C is &quot;more&quot; correct.
The answer B is related to quota which may return a 402 or 403 error and not a 503. If the new feature has a &quot;performance issue&quot; it can cause a delay in retrieve data and may cause an error like &quot;backendError&quot; or &quot;backendNotConnected&quot; or even &quot;notReady&quot;.

Eikistein - Aug 30, 2018

Sample case study is wrong, it should be Mountkirk Games and not TerramEarth.

A = I agree with Tamal if the database was offline, all users would get an error not “many of them”
B = That s it. Among the options, that would be the first thing to be investigated.
C = That s possible, but it wouldn t be the first thing to be investigated.
D = That would be an unbelievable choice. The scenario is the load-testing team indivertibly running some tests in production and causing the response to become slow. That would never be my first investigation.

Franky Lopez - Jul 27, 2018

If we consider that some users are experiencing this error (503) and not all, we can infer that is a disconnection problem to the backend service.

For project quota exceed, in the same documentation article (https://cloud.google.com/billing/v1/errors/core_errors), there&#39;s a 403 Forbidden error: dailyLimitExceeded A daily quota limit for the API has been reached.

Alexandre - Jul 26, 2018

It&#39;s quite vague as usual !
I would say B even if A could be checked as well !

Darek - Jun 29, 2018

Agree with Salim - Answer B. In case of answer A - all the users would get the error - and also a different error code as the application layer code would catch DB exception issue and fail gracefully.

Salim Masani - Jun 26, 2018

Answer B
https://cloud.google.com/billing/v1/errors/core_errors
SERVICE_UNAVAILABLE (503)
Error code Description
backendError A backend error occurred.
backendNotConnected The request failed due to a connection error.
notReady The API server is not ready to accept requests

Tamal - Jun 25, 2018

I do agree with Isaac .. It database would have been "offline" then no one would be able to access the service but it's saying "many of them are getting 503 errors" not "all" . It should not be option-"A".

Isaac - Jun 21, 2018

Answer C
I would expect this to be feature code rather than a database being offline. They don't even mention what kind of database and this doesn't even relate to any GCP products whatsoever.

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