Medium1 markMultiple Choice

GCP PCA · Question 27 · Domain 4: Analyzing and Optimizing Technical and Business Processes

Your organization has adopted Site Reliability Engineering (SRE) practices. The Service Level Objective (SLO) for your e-commerce checkout service is 99.9% availability over a 30-day rolling window. Currently, the service has experienced several outages, and the error budget has been completely exhausted. According to SRE best practices, what action should the team take?

Answer options:

A.

Lower the SLO to 99.0% so the team is no longer in violation.

B.

Halt all new feature deployments and focus engineering efforts exclusively on reliability and technical debt until the error budget recovers.

C.

Fire the engineers responsible for the outages to enforce accountability.

D.

Ignore the error budget and continue deploying features, as feature velocity is the most important metric for the business.

How to approach this question

Understand the purpose of an Error Budget in SRE. It balances feature velocity with reliability. When the budget is gone, reliability takes 100% priority.

Full Answer

B.Halt all new feature deployments and focus engineering efforts exclusively on reliability and technical debt until the error budget recovers.✓ Correct
Halt all new feature deployments and focus engineering efforts exclusively on reliability and technical debt until the error budget recovers.
In SRE, the error budget is the acceptable level of unreliability. It acts as a control mechanism. If the error budget is exhausted, it means the service is failing users too often. The standard SRE policy is to freeze new feature releases and redirect all engineering effort toward fixing bugs, improving testing, and paying down technical debt until the rolling window recovers.

Common mistakes

Thinking SRE is just about monitoring. SRE is a cultural and process framework. The error budget consequence (halting features) is the most critical process to enforce.

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