Google Professional Data Engineer Exam - Topic 5 Question 50 Discussion

Actual exam question for Google's Professional Data Engineer exam

Question #: 50
Topic #: 5

[All Professional Data Engineer Questions]

You have Cloud Functions written in Node.js that pull messages from Cloud Pub/Sub and send the data to BigQuery. You observe that the message processing rate on the Pub/Sub topic is orders of magnitude higher than anticipated, but there is no error logged in Stackdriver Log Viewer. What are the two most likely causes of this problem? Choose 2 answers.

APublisher throughput quota is too small.

BTotal outstanding messages exceed the 10-MB maximum.

CError handling in the subscriber code is not handling run-time errors properly.

DThe subscriber code cannot keep up with the messages.

EThe subscriber code does not acknowledge the messages that it pulls.

Show Suggested Answer

Suggested Answer: C, D

by Mitsue at May 07, 2022, 05:14 AM

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Ulysses

4 months ago

Are we sure it's not an issue with error handling? Seems odd.

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Quinn

4 months ago

Wow, I didn't realize the subscriber could fall behind like that!

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Fairy

4 months ago

I disagree, I don't think A is the issue here.

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Tiffiny

4 months ago

I think B could be a factor too. 10-MB limit is pretty low!

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Velda

5 months ago

Definitely D and E. Sounds like the subscriber is lagging.

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Freeman

5 months ago

I keep thinking about error handling. If the subscriber code isn't catching runtime errors properly, could that be causing the slowdown without logging any errors?

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Aileen

5 months ago

I feel like we had a practice question about message limits in Pub/Sub. Could the total outstanding messages exceeding the 10-MB max be a factor here?

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Vallie

5 months ago

I'm not entirely sure, but I think if the subscriber isn't acknowledging messages, that could lead to a backlog.

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Chau

5 months ago

I remember we discussed something about subscriber performance in class. Could it be that the subscriber code just can't keep up with the message rate?

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Beatriz

5 months ago

I'm a little confused by the mention of SAFe principles. Does that mean the Scrum Master's role goes beyond just Scrum? I'll need to think about how that fits into the answer.

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Jamika

5 months ago

I think the most important thing is that the teams are all on the same page about what "Done" means, so that the final product is ready to be released. Option D seems to capture that best.

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Latosha

5 months ago

Okay, I've got this. Cisco TrustSec uses software-defined segmentation to manage network access and security policies. That sounds like exactly what the question is asking about. I'm confident this is the right answer.

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Theodora

5 months ago

Okay, I think I can handle this. The key is to use the formula for the 90% confidence interval for the mean when the population standard deviation is known.

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