PCDOE Managing service incidents Practice Question
This PCDOE practice question tests your understanding of managing service incidents. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
An organization has a service that must meet a 99.99% SLO. The service runs on GKE and uses Cloud SQL. The team notices that during a major incident, the error budget is consumed rapidly. They want to implement a mechanism to automatically rollback deployments that cause sustained error budget consumption above a threshold. What is the best approach?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Use Cloud Scheduler to run a script that checks error budget and rolls back if needed.
Why wrong: Script solution is brittle; not a managed service.
B
Set up a deployment pipeline with Cloud Deploy that includes a predeployment validation step that checks the current error budget burn rate and blocks the release if the burn rate exceeds 10% per hour.
Automated policy prevents deployments that would consume error budget quickly.
C
Implement a canary deployment strategy with manual approval steps.
Why wrong: Manual approval delays rollback; not fully automated.
D
Configure Cloud Build to automatically revert the last commit if error budget is consumed.
Why wrong: Cloud Build is for building containers, not for rollback orchestration.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Set up a deployment pipeline with Cloud Deploy that includes a predeployment validation step that checks the current error budget burn rate and blocks the release if the burn rate exceeds 10% per hour.
Option A is correct because using Cloud Deploy or Spinnaker with automated rollback based on error budget burn rate is the recommended pattern. Option B is wrong because Cloud Build is CI, not deployment orchestration. Option C is wrong because canary deployments reduce blast radius but don't auto-rollback. Option D is wrong because manual rollback via Cloud Console is not automated.
Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Use Cloud Scheduler to run a script that checks error budget and rolls back if needed.
Why it's wrong here
Script solution is brittle; not a managed service.
✓
Set up a deployment pipeline with Cloud Deploy that includes a predeployment validation step that checks the current error budget burn rate and blocks the release if the burn rate exceeds 10% per hour.
Why this is correct
Automated policy prevents deployments that would consume error budget quickly.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Authentication checks who the user is.
✗
Implement a canary deployment strategy with manual approval steps.
Why it's wrong here
Manual approval delays rollback; not fully automated.
✗
Configure Cloud Build to automatically revert the last commit if error budget is consumed.
Why it's wrong here
Cloud Build is for building containers, not for rollback orchestration.
Common exam traps
Common exam trap: authentication is not authorization
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Detailed technical explanation
How to think about this question
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
KKey Concepts to Remember
Authentication checks who the user is.
Authorization controls what the user is allowed to do after login.
Privilege levels affect access to EXEC and configuration commands.
AAA, TACACS+ and RADIUS can separate login success from command access.
TExam Day Tips
→Do not assume successful login means full administrative access.
→Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
→Separate login problems from permission problems before choosing the answer.
Key takeaway
Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Real-world example
How this comes up in practice
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
Got this wrong? Here's your next step.
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related PCDOE questions on access control and AAA configuration.
Managing service incidents — This question tests Managing service incidents — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: Set up a deployment pipeline with Cloud Deploy that includes a predeployment validation step that checks the current error budget burn rate and blocks the release if the burn rate exceeds 10% per hour. — Option A is correct because using Cloud Deploy or Spinnaker with automated rollback based on error budget burn rate is the recommended pattern. Option B is wrong because Cloud Build is CI, not deployment orchestration. Option C is wrong because canary deployments reduce blast radius but don't auto-rollback. Option D is wrong because manual rollback via Cloud Console is not automated.
What should I do if I get this PCDOE question wrong?
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related PCDOE questions on access control and AAA configuration.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Authentication checks who the user is.
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