KCNA Cloud Native Architecture Practice Question
In event-driven architecture, which pattern is commonly used to decouple producers and consumers, allowing asynchronous communication?
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
✓
Event broker (message queue or event bus)
Event-driven architecture decouples producers and consumers via an event broker (e.g., message queue or event bus), enabling asynchronous communication. Direct synchronous calls would couple them.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Event broker (message queue or event bus)
Why this is correct
An event broker decouples producers and consumers by acting as an intermediary.
- ✗
Shared database
Why it's wrong here
Shared database creates coupling and is not an event-driven pattern.
- ✗
Circuit breaker pattern
Why it's wrong here
Circuit breaker is a resiliency pattern, not for decoupling.
- ✗
Synchronous REST API calls
Why it's wrong here
Synchronous calls couple producers and consumers.
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