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Confluent CCDAK Exam - Topic 3 Question 95 Discussion

A producer is sending messages with null key to a topic with 6 partitions using the DefaultPartitioner. Where will the messages be stored?
A) Partition 5
B) Any of the topic partitions
C) The partition for the null key
D) Partition 0

Confluent CCDAK Exam - Topic 3 Question 95 Discussion

Actual exam question for Confluent's CCDAK exam
Question #: 95
Topic #: 3
[All CCDAK Questions]

A producer is sending messages with null key to a topic with 6 partitions using the DefaultPartitioner. Where will the messages be stored?

Show Suggested Answer Hide Answer
Suggested Answer: A

Message with no keys will be stored with round-robin strategy among partitions.


by Chery at Jun 17, 2026, 09:18 PM

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Jeannetta
3 days ago
I agree with Emile. Null keys go to random partitions.
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Bev
8 days ago
I feel like it could be D. Partition 0.
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Emile
14 days ago
I think it's B. Any of the topic partitions.
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Hildred
19 days ago
Null key means random partition, right?
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Alva
24 days ago
I thought it would go to a specific one.
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Glenna
29 days ago
Wait, are you sure it’s not always Partition 0?
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Denny
1 month ago
Definitely B, that's how DefaultPartitioner works!
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Clemencia
1 month ago
Messages go to any partition.
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Lavina
1 month ago
I thought the DefaultPartitioner would send null keys to a specific partition, but now I'm confused about whether it's actually random or not.
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Lajuana
2 months ago
I practiced a similar question, and I feel like it might default to Partition 0, but I can't recall the exact reasoning behind it.
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Justine
2 months ago
I think when the key is null, it might just go to one of the partitions randomly, like any of the topic partitions?
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Clorinda
2 months ago
I remember something about how the DefaultPartitioner handles null keys, but I'm not entirely sure if it always goes to a specific partition.
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