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Google Professional Cloud Developer Exam - Topic 3 Question 48 Discussion

You manage an ecommerce application that processes purchases from customers who can subsequently cancel or change those purchases. You discover that order volumes are highly variable and the backend order-processing system can only process one request at a time. You want to ensure seamless performance for customers regardless of usage volume. It is crucial that customers' order update requests are performed in the sequence in which they were generated. What should you do?
C) Use a Pub/Sub subscriber in pull mode and use a data store to manage ordering.
A) Send the purchase and change requests over WebSockets to the backend.
B) Send the purchase and change requests as REST requests to the backend.
D) Use a Pub/Sub subscriber in push mode and use a data store to manage ordering.

Google Professional Cloud Developer Exam - Topic 3 Question 48 Discussion

Actual exam question for Google's Professional Cloud Developer exam
Question #: 48
Topic #: 3
[All Professional Cloud Developer Questions]

You manage an ecommerce application that processes purchases from customers who can subsequently cancel or change those purchases. You discover that order volumes are highly variable and the backend order-processing system can only process one request at a time. You want to ensure seamless performance for customers regardless of usage volume. It is crucial that customers' order update requests are performed in the sequence in which they were generated. What should you do?

Show Suggested Answer Hide Answer
Suggested Answer: C

https://cloud.google.com/pubsub/docs/pull


by Bette at May 04, 2022, 04:13 PM

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Kaycee
10 months ago
Definitely need to keep requests in order, so C is the way to go!
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Marsha
10 months ago
Wait, can WebSockets really handle that many requests?
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Edmond
11 months ago
Push mode (Option D) seems risky, what if messages get lost?
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Sylvie
11 months ago
I think REST requests (Option B) would be simpler.
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Felicitas
11 months ago
Option C sounds solid for managing order sequence.
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Barney
11 months ago
I lean towards the push mode for Pub/Sub since it seems more efficient, but I’m not entirely confident about how it manages ordering compared to pull mode.
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Susana
11 months ago
I practiced a similar question about message ordering, and I think using a Pub/Sub model is a good idea, but I can't recall if pull or push is better for this scenario.
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Tu
11 months ago
I think using REST requests could work, but I feel like they might not handle the sequence as well as something else could.
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Dorathy
11 months ago
I remember we discussed the importance of maintaining order in requests, but I'm not sure if WebSockets would guarantee that.
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Laquita
11 months ago
Hmm, I'm not totally sure about this one. Encryption is used to protect data, but I don't think that's the right answer here. Let me think this through a bit more.
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Suzi
11 months ago
This looks like a tricky one. I'm not entirely sure about the correct syntax, but I think option D, "zlogin - z testzone - C", might be the way to go. I'll make a note to review the zone management commands before the exam.
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Veronika
11 months ago
This looks like a straightforward Linux command question. I think I know the answer, but I'll double-check the options just to be sure.
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