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Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

1. (You create a topic with five partitions.
What can you assume about messages read from that topic by a single consumer group?)

A) All messages will be read from exactly one broker by the consumer group.
B) Messages from one partition can be consumed by any of the consumers in a group for faster processing.
C) The consumer group can only read the same number of messages from all the partitions.
D) Messages can be consumed by a maximum of five consumers in the same consumer group.

2. Which two statements about Kafka Connect Single Message Transforms (SMTs) are correct?
(Select two.)

A) SMTs are often used to join multiple records from a source data system into a single Kafka record.
B) Masking data is a good example of an SMT.
C) Multiple SMTs can be chained together and act on source or sink messages.
D) SMT functionality is included within Kafka Connect converters.

3. (You are building real-time streaming applications using Kafka Streams.
Your application has a custom transformation.
You need to define custom processors in Kafka Streams.
Which tool should you use?)

A) Processor API
B) TopologyTestDriver
C) Kafka Streams Custom Transformation Language
D) Kafka Streams Domain Specific Language (DSL)

4. You have a topic with four partitions. The application reads from it using two consumers in a single consumer group.
Processing is CPU-bound, and lag is increasing.
What should you do?

A) Add more partitions to the topic to increase the level of parallelism of the processing.
B) Decrease the max.poll.records property of consumers.
C) Add more consumers to increase the level of parallelism of the processing.
D) Increase the max.poll.records property of consumers.

5. You need to consume messages from Kafka using the command-line interface (CLI).
Which command should you use?

A) kafka-console-consumer
B) kafka-get-messages
C) kafka-consumer
D) kafka-consume

Solutions: