[Solved] Given this Kafka setup for CQRS:commands_topic = ['CreateOrder', 'UpdateOrder'] events_topic = ['OrderCreated', 'OrderUpdated'] Which topic should a read service subscribe to for query data? | Kafka

Kafka - Event-Driven Architecture

Given this Kafka setup for CQRS:

commands_topic = ['CreateOrder', 'UpdateOrder']
events_topic = ['OrderCreated', 'OrderUpdated']

Which topic should a read service subscribe to for query data?

Acommands_topic

BBoth commands_topic and events_topic

Cevents_topic

DNeither, it reads directly from the database

Step-by-Step Solution

Solution:

Step 1: Identify read service role
Read services in CQRS listen to events that represent state changes, not commands which are requests.
Step 2: Match topic to read service
Events_topic contains 'OrderCreated' and 'OrderUpdated' which reflect changes; read service subscribes here.
Final Answer:
events_topic -> Option C
Quick Check:
Read service subscribes to events_topic [OK]

Quick Trick: Reads listen to events, not commands [OK]

Common Mistakes:

Subscribing read service to commands_topic
Subscribing to both topics unnecessarily
Assuming reads bypass Kafka

Master "Event-Driven Architecture" in Kafka

9 interactive learning modes - each teaches the same concept differently

Learn Why Deep Visual Try Challenge Project Recall Time

More Kafka Quizzes

Given this Kafka setup for CQRS:

Step 1: Identify read service role

Step 2: Match topic to read service

Final Answer:

Quick Check:

Want More Practice?