Google Professional Cloud DevOps Engineer Exam - Topic 9 Question 11 Discussion

Actual exam question for Google's Professional Cloud DevOps Engineer exam

Question #: 11
Topic #: 9

[All Professional Cloud DevOps Engineer Questions]

Your product is currently deployed in three Google Cloud Platform (GCP) zones with your users divided between the zones. You can fail over from one zone to another, but it causes a 10-minute service disruption for the affected users. You typically experience a database failure once per quarter and can detect it within five minutes. You are cataloging the reliability risks of a new real-time chat feature for your product. You catalog the following information for each risk:

* Mean Time to Detect (MUD} in minutes

* Mean Time to Repair (MTTR) in minutes

* Mean Time Between Failure (MTBF) in days

* User Impact Percentage

The chat feature requires a new database system that takes twice as long to successfully fail over between zones. You want to account for the risk of the new database failing in one zone. What would be the values for the risk of database failover with the new system?

MTTD: 5

MTTR: 10

MTBF: 90

Impact: 33%

MTTD:5

MTTR: 20

MTBF: 90

Impact: 33%

CMTTD:5
MTTR: 10
MTBF: 90
Impact 50%
D.
MTTD:5
MTTR: 20
MTBF: 90
Impact: 50%

Show Suggested Answer

Suggested Answer: C

by Tasia at May 08, 2022, 04:13 AM

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Willard

4 months ago

I agree, the impact should be 33%, not 50%.

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Ahmed

4 months ago

MTBF stays the same, but the impact should be lower, right?

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Kanisha

4 months ago

Wait, why is the impact percentage higher in C and D? That seems off.

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Nan

4 months ago

I think B is the right choice.

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Adolph

5 months ago

MTTR goes up to 20 minutes with the new system.

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Virgilio

5 months ago

I feel like the MTBF should stay the same at 90 days since that’s based on historical data, but I’m not entirely confident about the impact percentage.

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Julian

5 months ago

I'm a bit unsure about the user impact percentage. Since the chat feature is real-time, could it be higher than 33%?

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Meaghan

5 months ago

I practiced a similar question where the MTTR was directly affected by the failover time. I think the new MTTR should be 20 minutes.

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Broderick

5 months ago

I remember that MTTR usually reflects the time it takes to recover from a failure, so I think it might be higher with the new database since it takes longer to fail over.

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Janna

5 months ago

Easy peasy! The statement clearly says the Control process blade is responsible for ensuring regulatory compliance, so the answer has to be TRUE.

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Denise

5 months ago

Azure Key Vault is definitely the way to go. It provides the highest level of security and management features for certificates compared to the other options.

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Mona

5 months ago

Okay, I think I've got this. We need to consider the companies' earnings, tax rates, and the potential for improved performance through "bootstrapping". I'll work through the calculations carefully to find the maximum price.

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Regenia

5 months ago

Ah, I remember learning about TRIZ in one of my engineering classes. It's definitely a set of problem-solving tools, not an organization or an experiment. Option A is the way to go.

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Boris

5 months ago

I'm not entirely sure, but I feel like there was a question about metrics for EBS volumes in practice. Maybe reconfiguring the alarms to use the correct metrics could help, like in option C?

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