[Solved] In Kafka, what is the main purpose of assigning a key to a message? — Ans: To determine the partition where the message will be stored | Kafka

Kafka - Producers

In Kafka, what is the main purpose of assigning a key to a message?

ATo determine the partition where the message will be stored

BTo encrypt the message content

CTo specify the message timestamp

DTo set the message priority in the queue

Step-by-Step Solution

Solution:

Step 1: Understand Kafka message key role
The key in Kafka is used to decide which partition the message goes to, ensuring messages with the same key go to the same partition.
Step 2: Compare options with key purpose
Encryption, timestamp, and priority are not controlled by the key; only partitioning is.
Final Answer:
To determine the partition where the message will be stored -> Option A
Quick Check:
Message key = Partition selector [OK]

Quick Trick: Message key controls partitioning, not content or priority [OK]

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In Kafka, what is the main purpose of assigning a key to a message?