Google PCA Ensure solution and operations reliability Practice Question
A company wants to improve the reliability of their microservices architecture on Google Cloud. Which TWO practices should they implement? (Choose 2)
⚠ Common exam trap
Google Cloud often tests the misconception that synchronous communication is more reliable because it provides immediate feedback, but in distributed systems, asynchronous patterns and resilience mechanisms like retries and circuit breakers are actually critical for reliability.
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
✓
Implement retry with exponential backoff
B is correct because implementing retry with exponential backoff allows transient failures (e.g., network timeouts, temporary service unavailability) to be handled gracefully by automatically retrying the request after increasing delays, reducing load on the recovering service. This pattern is essential in microservices on Google Cloud to improve reliability without overwhelming downstream dependencies.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Design with a single point of failure for simplicity
Why it's wrong here
Single points of failure reduce overall reliability.
- ✓
Implement retry with exponential backoff
Why this is correct
Retry with backoff handles transient failures without overwhelming the system.
- ✗
Use synchronous communication between all services
Why it's wrong here
Synchronous communication creates tight coupling and can cause cascading failures.
- ✓
Implement circuit breaker pattern
Why this is correct
Circuit breaker stops calls to a failing service, preventing cascading failures.
- ✗
Disable health checks to reduce latency
Why it's wrong here
Health checks are critical for load balancers to route traffic to healthy instances.
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
Service
A service is a software component or system that performs a specific function and is available to be used by other programs or users over a network.
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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.