Google PCA Practice Question: Analysing and Optimising Technical and Business Processes
A company is adopting Site Reliability Engineering (SRE) practices. After a major incident, they want to conduct a review to understand what went wrong and how to prevent recurrence, without blaming individuals. Which SRE practice should they follow?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Conduct a blameless postmortem
A blameless postmortem focuses on learning from incidents without assigning blame. Error budgets are for measuring reliability, SLOs/SLIs are for defining targets, and capacity planning is for scaling.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Define SLOs and SLIs
Why it's wrong here
SLOs and SLIs are used to set and measure reliability targets, not for incident review.
- ✗
Create an error budget policy
Why it's wrong here
Error budgets are used to balance reliability with feature velocity, not for incident postmortems.
- ✗
Perform capacity planning
Why it's wrong here
Capacity planning is about ensuring sufficient resources, not incident analysis.
- ✓
Conduct a blameless postmortem
Why this is correct
A blameless postmortem is an SRE practice to review incidents without blame, focusing on systemic improvements.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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