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Why does Kafka limit each partition to be consumed by only one consumer in a group at a time?

hard📝 Conceptual Q10 of 15
Kafka - Consumer Groups
Why does Kafka limit each partition to be consumed by only one consumer in a group at a time?
ATo reduce the number of partitions needed in a topic.
BTo increase the number of messages produced per second.
CTo allow multiple consumers to read the same message simultaneously.
DTo prevent duplicate processing and maintain message order within the partition.
Step-by-Step Solution
Solution:

  1. Step 1: Understand partition consumption rules

    Only one consumer per partition avoids duplicate reads and keeps order.

  2. Step 2: Identify why this matters

    Maintaining order and avoiding duplicates is critical for reliable processing.

  3. Final Answer:

    To prevent duplicate processing and maintain message order within the partition. -> Option D

  4. Quick Check:

    Single consumer per partition ensures order and no duplicates = A [OK]
Quick Trick: One consumer per partition keeps order and avoids duplicates [OK]
Common Mistakes:
  • Thinking multiple consumers can read same partition simultaneously
  • Believing this increases message production speed
  • Assuming it reduces partitions needed

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