Google Professional Cloud DevOps Engineer Question 110
Select 2Google Cloud PlatformYour team manages a large e-commerce application hosted on Google Cloud. Recently, one of your services started experiencing intermittent failures due to a dependency issue. To minimize the impact on users, you decide to implement a solution while the dependency issue is being resolved. Which of the following approaches would best mitigate the user impact during the incident?
- A
Implement a circuit breaker pattern to fail fast and prevent cascading failures.
- B
Deploy a new version of the service with additional logging to investigate the root cause.
- C
Use a fallback mechanism to serve cached or default responses for impacted requests.
- D
Scale up the impacted service to handle increased error rates.
- E
Redirect traffic from the impacted service to a maintenance page informing users of the issue.
Show answer and explanation
Correct answers: A, C
Explanation
To mitigate incident impact on users, the most effective strategies involve reducing the consequences of the failure on the user experience. Implementing a circuit breaker prevents cascading failures, and a fallback mechanism ensures users still receive a response, even if degraded. These approaches prioritize user experience while the underlying issue is being resolved.
- A. Correct.
A circuit breaker pattern helps to fail fast and prevent cascading failures to other dependent systems, reducing the overall impact on users.
- B. Incorrect.
Deploying a new version with additional logging focuses on debugging and root cause analysis but does not immediately mitigate the impact on users.
- C. Correct.
Using a fallback mechanism ensures users receive some response, such as cached or default data, even if the primary service is unavailable, thereby reducing user impact.
- D. Incorrect.
Scaling up the impacted service may not help if the root cause is a dependency issue, and it could cause unnecessary resource consumption without resolving the problem.
- E. Incorrect.
Redirecting traffic to a maintenance page informs users of the issue but does not actively mitigate the service degradation, which might still impact user experience.