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What is the main purpose of the subscribe() method in Kafka consumers?

easy📝 Conceptual Q11 of 15
Kafka - Consumers
What is the main purpose of the subscribe() method in Kafka consumers?
ATo close the Kafka consumer connection
BTo send messages to Kafka topics
CTo listen to one or more Kafka topics and receive messages automatically
DTo create new Kafka topics
Step-by-Step Solution
Solution:

  1. Step 1: Understand the role of subscribe()

    The subscribe() method is used by Kafka consumers to specify which topics they want to listen to.

  2. Step 2: Identify what subscribe() enables

    Once subscribed, the consumer automatically receives messages from those topics when calling poll().

  3. Final Answer:

    To listen to one or more Kafka topics and receive messages automatically -> Option C

  4. Quick Check:

    subscribe() = listen to topics [OK]
Quick Trick: subscribe() means start listening to topics [OK]
Common Mistakes:
  • Confusing subscribe() with sending messages
  • Thinking subscribe() creates topics
  • Assuming subscribe() closes connections

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