KCNA Cloud Native Architecture Practice Question
A team is designing a cloud-native application that requires each microservice to have its own database. This pattern is known as:
⚠ Common exam trap
CNCF often tests the misconception that the Saga pattern defines database ownership, when in fact it is a transaction coordination pattern, not a data isolation strategy.
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
✓
Database-per-service pattern
The Database-per-service pattern is the correct answer because it ensures each microservice owns and manages its own database, enforcing loose coupling and data encapsulation. This aligns with the cloud-native principle of decentralized data management, where services communicate only via APIs and never access each other's databases directly. It prevents tight coupling at the data layer, which is critical for independent scaling, deployment, and resilience in a microservices architecture.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Saga pattern
Why it's wrong here
For distributed transactions.
- ✓
Database-per-service pattern
Why this is correct
Each service has its own private database.
- ✗
Shared database pattern
Why it's wrong here
Shared database couples services.
- ✗
CQRS pattern
Why it's wrong here
For separate read and write models.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This KCNA practice question is part of Courseiva's free CNCF 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 KCNA exam.