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Exam Professional Cloud Architect topic 6 question 7 discussion

Actual exam question from Google's Professional Cloud Architect
Question #: 7
Topic #: 6
[All Professional Cloud Architect Questions]

For this question, refer to the Mountkirk Games case study. You are in charge of the new Game Backend Platform architecture. The game communicates with the backend over a REST API.
You want to follow Google-recommended practices. How should you design the backend?

  • A. Create an instance template for the backend. For every region, deploy it on a multi-zone managed instance group. Use an L4 load balancer.
  • B. Create an instance template for the backend. For every region, deploy it on a single-zone managed instance group. Use an L4 load balancer.
  • C. Create an instance template for the backend. For every region, deploy it on a multi-zone managed instance group. Use an L7 load balancer.
  • D. Create an instance template for the backend. For every region, deploy it on a single-zone managed instance group. Use an L7 load balancer.
Show Suggested Answer Hide Answer
Suggested Answer: C 🗳️
by jcmoranp at Oct. 26, 2019, 11:46 a.m.

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jcmoranp
Highly Voted 5 years ago
It's C. You need a L7 balancer and multi-zone
upvoted 66 times
nitinz
3 years, 7 months ago
It is C, you need L7 & mulit-region as its the ask.
upvoted 7 times
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tartar
4 years, 2 months ago
C is ok
upvoted 15 times
bjuneja
3 years, 11 months ago
L4 load balancing offers traffic management of transactions at the network protocol layer (TCP/UDP). ... L7 load balancing works at the highest level of the OSI model. L7 bases its routing decisions on various characteristics of the HTTP/HTTPS header Mountrik requirment is global so C is ok
upvoted 14 times
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JJu
Highly Voted 4 years, 11 months ago
I think answer is C. This game type is mobile. Check this link : https://cloud.google.com/solutions/gaming/cloud-game-infrastructure#dedicated_game_server I recommend this section : ‘Request/response based servers’ explain : In particular, however, mobile game servers, without a critical demand for real-time communication, have adopted HTTP request and response semantics like those used in web hosting. this game use HTTP load balancer. HTTP load balancer is L7.
upvoted 22 times
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kratosmat
Most Recent 1 year, 6 months ago
Selected Answer: A
we don't need multi-zonal if we have multi-region. the traffic is internal, we could need an L7 LB if there are specific requirements, but I don't see them.
upvoted 1 times
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surajkrishnamurthy
1 year, 10 months ago
Selected Answer: C
C gives best option Key word "REST API " "L7 balancer" , "Multi Zone"
upvoted 4 times
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megumin
1 year, 11 months ago
Selected Answer: C
C is ok
upvoted 1 times
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AzureDP900
2 years ago
C perfectly make sense
upvoted 2 times
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muneebarshad
2 years, 1 month ago
Selected Answer: B
I think the answer is B and here is my reasoning. Users never communicate with the Backend server (due to security reasons) there is always a Frontend Service that is open to the internet and FE Service communicates with BE Server. The reason they called it Backend Serer is since it must have a Front end server refer to the solution reference (https://reviewnprep.com/blog/gcp-how-to-work-on-mountkirk-games-case-study/) the traffic flow should look like this...... User(mobile) -> FE Game Server (hosted in GCP) -> BE Server (hosted in GCP) Since BE Service is not exposed to the internet therefore we would require a regional L4 Balancer since regional Load Balancer is NOT internet facing and it's from VM to VM
upvoted 1 times
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jabrrJ68w02ond1
2 years, 1 month ago
Multi-zone makes it high available. L7 balances load for e.g. HTTP traffic. So the answer is C. Why not A? L4 works at the network protocol (TCP/UDP) which is not suitable for REST APIs.
upvoted 2 times
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DrishaS4
2 years, 2 months ago
Selected Answer: C
L7 LB for RestAPI.
upvoted 2 times
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Nirca
2 years, 3 months ago
Selected Answer: C
C it is
upvoted 1 times
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amxexam
2 years, 5 months ago
Selected Answer: C
C is correct
upvoted 1 times
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SAMBIT
2 years, 7 months ago
Out dated case study. Don’t waste time https://cloud.google.com/certification/guides/professional-cloud-architect https://services.google.com/fh/files/blogs/master_case_study_mountkirk_games.pdf
upvoted 2 times
dija123
6 months, 3 weeks ago
Mountkirk is not out dated: https://cloud.google.com/learn/certification/guides/professional-cloud-architect
upvoted 1 times
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amanp
2 years, 7 months ago
It is A, it is backend API and not frontend
upvoted 2 times
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OrangeTiger
2 years, 9 months ago
Selected Answer: C
Ummm.I think the case must choose L7 LB for RestAPI. Additional,the company require world wide scale. So i chose C.
upvoted 2 times
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zxcv1234
2 years, 10 months ago
Selected Answer: C
C is correct. HTTP/S is layer 7
upvoted 1 times
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ABO_Doma
2 years, 10 months ago
C is the correct answer
upvoted 1 times
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vincy2202
2 years, 10 months ago
Selected Answer: C
C is the correct answer
upvoted 1 times
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