Authentic Confluent Certification Exam CCDAK Questions Answers

C is true: When a new broker is added,no partitions are assigned to itunless you create new topics orreassign existing onesusing kafka-reassign-partitions.sh.

D is true: Kafka brokers arehot-pluggable; no need to stop the cluster when scaling.

FromKafka Operations Guide:

“A newly added broker won’t be assigned partitions until reassignments or new topic creation.”

“Kafka allows dynamic scaling by adding brokers without downtime.”

A is false: Broker IDs must bemanually setunless using dynamic broker registration in KRaft mode.

B is false unless the cluster usesKRaft modeand the broker isspecifically assigneda controller role.

A:Kafka batches storecompression metadata in their headers, indicating how the batch was compressed.

B:Compression is controlled via theproducer config compression.type, which defaults to none. Producers explicitly set Gzip or other formats.

FromKafka Producer Docs:

“Compression is done by the producer, and the type is stored in the message batch metadata. The broker does not recompress.”

C is false: messages are serializedbeforecompression.

D is false: messages without keys are distributed acrossmultiple partitions.

Unit Testing→ MockProducer

Integration Testing→ Testcontainers

Performance Testing→ Trogdor

Mock Data Generation→ Connect Datagen

MockProducer: Simulates a Kafka producer in unit tests (no real broker interaction).

Testcontainers: Spawns Kafka in Docker forreal environment testing.

Trogdor: Kafka’s built-inperformance load testingframework.

Connect Datagen: Createssample source recordsfor test and demo purposes.

FromKafka Developer Tools Guide:

“Kafka developers commonly use MockProducer for unit tests, Testcontainers for integration, and Trogdor for performance tests.”