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Confluent CCDAK Exam Syllabus Topics:

Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

1. Which configuration determines how many bytes of data are collected before sending messages to the Kafka broker?

A) batch.size
B) max.block.size
C) buffer.memory
D) send.buffer.bytes

2. Which two statements are correct about transactions in Kafka?
(Select two.)

A) Consumers can consume both committed and uncommitted transactions.
B) Transactions guarantee at least once delivery of messages.
C) All messages from a failed transaction will be deleted from a Kafka topic.
D) Transactions are only possible when writing messages to a topic with single partition.
E) Information about producers and their transactions is stored in the _transaction_state topic.

3. 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-reassign-topics.sh
D) kafka-topics.sh

4. Kafka producers can batch messages going to the same partition.
Which statement is correct about producer batching?

A) Producers can only batch messages of the same size.
B) Producers can include multiple batches in a single request to a broker.
C) Producers have a separate background thread for each batch.
D) Two or more broker failures will automatically disable batching on the producer.

5. You have a consumer group with default configuration settings reading messages from your Kafka cluster.
You need to optimize throughput so the consumer group processes more messages in the same amount of time.
Which change should you make?

A) Remove some consumers from the consumer group.
B) Disable auto commit and have the consumers manually commit offsets.
C) Decrease the session timeout of each consumer.
D) Increase the number of bytes the consumers read with each fetch request.

Solutions: