[Solved] Why does Kafka's subscribe() method accept a collection of topics instead of a single topic string? — Ans: To allow consumers to listen to multiple topics simultaneously. | Kafka

Kafka - Consumers

Why does Kafka's subscribe() method accept a collection of topics instead of a single topic string?

ATo enforce that consumers cannot subscribe to only one topic.

BBecause Kafka topics must always be grouped in collections.

CTo allow consumers to listen to multiple topics simultaneously.

DBecause the method internally converts strings to collections automatically.

Step-by-Step Solution

Solution:

Step 1: Understand Kafka consumer subscription design
Kafka consumers often need to listen to multiple topics at once for flexibility.
Step 2: Analyze the purpose of collection parameter
Accepting a collection allows subscribing to one or many topics in a single call.
Final Answer:
To allow consumers to listen to multiple topics simultaneously. -> Option C
Quick Check:
subscribe() accepts collections for multi-topic listening [OK]

Quick Trick: subscribe() uses collections to support multiple topics [OK]

Common Mistakes:

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Why does Kafka's subscribe() method accept a collection of topics instead of a single topic string?