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Confluent Certification
CCDAK Exam
Confluent.CCDAK.v2025-10-15.q103 Dumps

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Question 6

To enhance compression, I can increase the chances of batching by using

A.acks=all
B.linger.ms=20
C.batch.size=65536
D.max.message.size=10MB

Correct Answer: B

linger.ms forces the producer to wait before sending messages, hence increasing the chance of creating batches that can be heavily compressed.

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Question 7

How will you set the retention for the topic named my-topic to 1 hour?

A.Set the broker config log.retention.ms to 3600000
B.Set the consumer config retention.ms to 3600000
C.Set the topic config retention.ms to 3600000
D.Set the producer config retention.ms to 3600000

Correct Answer: C

retention.ms can be configured at topic level while creating topic or by altering topic. It shouldn't be set at the broker level (log.retention.ms) as this would impact all the topics in the cluster, not just the one we are interested in

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Question 8

Which configuration allows more time for the consumer poll to process records?

A.session.timeout.ms
B.heartbeat.interval.ms
C.max.poll.interval.ms
D.fetch.max.wait.ms

Correct Answer: C

max.poll.interval.ms defines themaximum delay between invocations of poll()before the consumer is considered failed. It essentially gives consumers more time to process records before needing to poll again.
FromKafka Consumer Configuration Reference:
"max.poll.interval.ms: The maximum delay between invocations of poll() when using consumer group management. If poll() is not called before expiration, the consumer is considered failed."
* session.timeout.ms and heartbeat.interval.ms relate to group coordination and heartbeats.
* fetch.max.wait.ms affects how long the broker waits to accumulate data before sending a fetch response.
Reference:Apache Kafka Consumer Configs

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Question 9

To transform data from a Kafka topic to another one, I should use

A.Kafka Connect Sink
B.Kafka Connect Source
C.Consumer + Producer
D.Kafka Streams

Correct Answer: D

Kafka Streams is a library for building streaming applications, specifically applications that transform input Kafka topics into output Kafka topics

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Question 10

Which tool can you use to modify the replication factor of an existing topic?

A.kafka-reassign-partitions.sh
B.kafka-recreate-topic.sh
C.kafka-topics.sh
D.kafka-reassign-topics.sh

Correct Answer: A

To change the replication factor of an existing topic, you must perform apartition reassignment, because the replication factor is not directly modifiable via kafka-topics.sh. Thekafka-reassign-partitions.shtool is the official command-line utility to handle partition reassignments, including changing the replication factor.
This tool allows you to generate a reassignment JSON specifying new replica assignments per partition and then apply it.
From official documentation:
"To change the replication factor, use the kafka-reassign-partitions tool to assign the partitions to more or fewer brokers." Neither kafka-topics.sh nor kafka-reassign-topics.sh exists for this purpose, and kafka-recreate-topic.sh isnot an official Kafka tool.
Reference:Apache Kafka documentation > Operations > Changing Replication Factor

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