Question 452 of 964
PCD Building and testing applications Practice Question
A company is migrating a monolithic Java application to microservices on Google Kubernetes Engine (GKE). The application uses a shared MySQL database. The team wants to adopt a testing strategy that validates service interactions without deploying to a full cluster. Which testing approach is most appropriate?
⚠ Common exam trap
The PCD exam often tests the distinction between testing levels in a microservices context; the trap here is that candidates confuse 'validating service interactions without a full cluster' with end-to-end testing, but the key constraint is avoiding full deployment, which CDC satisfies by using contract stubs and provider verification in isolated environments.
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
✓
Consumer-driven contract testing with tools like Spring Cloud Contract.
Consumer-driven contract testing (CDC) with tools like Spring Cloud Contract validates the interactions between microservices by defining and verifying API contracts (e.g., request/response formats, headers, status codes) without requiring a full GKE cluster. This approach is ideal for a migration from a monolithic Java application because it ensures that each service adheres to its expected behavior when communicating over HTTP or messaging, catching integration issues early in the development cycle. It does not require deploying to a cluster, making it faster and more lightweight than end-to-end testing.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Load testing to simulate production traffic.
Why it's wrong here
Load testing focuses on performance, not functional interaction validation.
- ✗
Unit testing with mocked dependencies.
Why it's wrong here
Unit tests test individual components, not service interactions.
- ✓
Consumer-driven contract testing with tools like Spring Cloud Contract.
Why this is correct
Contract testing validates that services adhere to agreed-upon contracts without full deployment.
- ✗
End-to-end testing in a staging environment.
Why it's wrong here
End-to-end tests require a deployed environment; the team wants to avoid full cluster deployment.
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Last reviewed: Jun 11, 2026
This PCD 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 PCD exam.
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