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What is the main purpose of committing consumer offsets in Kafka?

easy🧠 Conceptual Q11 of Q15
Kafka - Message Delivery Semantics
What is the main purpose of committing consumer offsets in Kafka?
ATo delete old messages from the topic
BTo increase the speed of message production
CTo create new topics automatically
DTo track which messages have been processed to avoid duplicates
Step-by-Step Solution
Solution:

  1. Step 1: Understand consumer offset role

    Consumer offsets mark the position of the last processed message in a partition.

  2. Step 2: Identify the purpose of committing offsets

    Committing offsets helps Kafka know where to resume reading after a restart, preventing duplicate processing.

  3. Final Answer:

    To track which messages have been processed to avoid duplicates -> Option D

  4. Quick Check:

    Offset commit = track processed messages [OK]
Quick Trick: Offsets mark progress to avoid reprocessing messages [OK]
Common Mistakes:
MISTAKES
  • Confusing offset commit with message production speed
  • Thinking offsets delete messages
  • Believing offsets create topics

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