Managing Implementation and Ensuring Solution and Operations Reliability →hardMultiple SelectObjective-mapped
Google PCA Practice Question: Managing Implementation and Ensuring Solution and Operations Reliability
Your organization runs a microservices application on GKE Autopilot. You want to implement a gradual rollout of a new version with the ability to compare performance metrics between the old and new versions. Which TWO approaches should you combine?
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
✓
Configure A/B testing with Traffic Director by routing based on request headers.
A canary deployment gradually shifts traffic to the new version. Traffic Director provides service mesh capabilities including traffic splitting and metrics. Istio can also be used. A/B testing requires routing rules based on headers or other criteria; Traffic Director can do this. Cloud Deploy supports canary but does not handle A/B testing natively. The combination of canary deployment (via Traffic Director) and A/B testing (with Traffic Director's routing rules) allows gradual rollout and comparison.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Configure A/B testing with Traffic Director by routing based on request headers.
Why this is correct
Traffic Director can route traffic based on headers, enabling A/B testing.
- ✓
Implement a canary deployment using Traffic Director.
Why this is correct
Traffic Director supports canary releases with traffic splitting.
- ✗
Use Cloud Deploy's rollout strategy with a canary phase.
Why it's wrong here
Cloud Deploy can deploy but does not provide performance comparison features.
- ✗
Use Cloud Load Balancing to gradually shift traffic from old to new version.
Why it's wrong here
Cloud Load Balancing can shift traffic but lacks fine-grained A/B testing capabilities.
- ✗
Use GKE blue-green deployment and manually compare metrics.
Why it's wrong here
Blue-green does not provide gradual rollout or automatic comparison.
Go deeper
Related to this question
Learn chapter
Introduction to Google Cloud Platform
Key term
Microservices
Microservices is an architectural style where a software application is built as a collection of small, independent services, each handling a specific business function and communicating over a network.
Key term
Cloud Deploy
Cloud Deploy is the process of releasing software applications and updates from development to production environments that run on cloud infrastructure.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PCA practice question is part of Courseiva's free Google Cloud certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PCA exam.