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Confluent CCDAK Exam - Topic 1 Question 93 Discussion

Which of the following Kafka Streams operators are stateful? (select all that apply)
B) reduce and C) joining and D) count and F) aggregate
A) flatmap
E) peek

Confluent CCDAK Exam - Topic 1 Question 93 Discussion

Actual exam question for Confluent's CCDAK exam
Question #: 93
Topic #: 1
[All CCDAK Questions]

Which of the following Kafka Streams operators are stateful? (select all that apply)

Show Suggested Answer Hide Answer
Suggested Answer: B, C, D, F

Seehttps://kafka.apache.org/20/documentation/streams/developer-guide/dsl-api.html#stateful-transformations


by Frederic at May 15, 2026, 05:40 AM

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Latosha
2 hours ago
B, C, D, F are stateful.
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Dominga
5 days ago
Joining seems tricky; I think it might be stateful too, but I can't recall all the details.
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Kaycee
10 days ago
I practiced a question similar to this, and I feel like flatmap and peek are stateless, but I could be wrong.
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Lachelle
16 days ago
I think count is also stateful since it keeps track of the number of records, right?
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Evelynn
2 months ago
I remember that reduce and aggregate are definitely stateful, but I'm not sure about joining.
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