You want to ensure exactly-once message delivery in Kafka with retries enabled. Which combination of settings should you use?

hard📝 Application Q15 of 15

Kafka - Producers

A<code>enable.idempotency=true</code>, <code>retries>0</code>, <code>acks='all'</code>

B<code>enable.idempotency=false</code>, <code>retries=0</code>, <code>acks=1</code>

C<code>enable.idempotency=true</code>, <code>retries=0</code>, <code>acks=0</code>

D<code>enable.idempotency=false</code>, <code>retries>0</code>, <code>acks=0</code>

Step-by-Step Solution

Solution:

Step 1: Identify settings for exactly-once delivery
Exactly-once requires idempotency enabled, retries to resend on failure, and acks='all' for full commit guarantee.
Step 2: Evaluate each option
enable.idempotency=true, retries>0, acks='all' has all required settings. Others disable idempotency or retries or use weak acks.
Final Answer:
enable.idempotency=true, retries>0, acks='all' -> Option A
Quick Check:
Idempotency + retries + acks='all' = exactly-once [OK]

Quick Trick: Enable idempotency, retries, and acks='all' for exactly-once [OK]

Common Mistakes:

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