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Confluent CCDAK Exam Syllabus Topics:

Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

1. You are experiencing low throughput from a Java producer.
Metrics show low I/O thread ratio and low I/O thread wait ratio.
What is the most likely cause of the slow producer performance?

A) The producer is sending large batches of messages.
B) Compression is enabled.
C) The producer code has an expensive callback function.
D) There is a bad data link layer (layer 2) connection from the producer to the cluster.

2. (You deploy a Kafka Streams application with five application instances.
Kafka Streams stores application metadata using internal topics.
Auto-topic creation is disabled in the Kafka cluster.
Which statement about this scenario is true?)

A) The application will be on hold until internal topics are created manually.
B) The application will continue to work and internal topics will be created, even if auto-topic creation is disabled.
C) The application will terminate with a non-retriable exception.
D) The application will work, but application metadata will not be stored.

3. Where are source connector offsets stored?

A) offset, storage, partitions
B) offset.storage.topic
C) storage.offset.topic
D) topic.offset.config

4. You are developing a Java application using a Kafka consumer.
You need to integrate Kafka's client logs with your own application's logs using log4j2.
Which Java library dependency must you include in your project?

A) Just the log4j2 dependency of the application
B) SLF4J implementation for Log4j2 (org.apache.logging.log4j:log4j-slf4j-impl)
C) None, the right dependency will be added by the Kafka client dependency by transitivity.
D) SLF4J implementation for Log4j 1.2 (org.slf4j:slf4j-log4j12)

5. You need to explain the best reason to implement the consumer callback interface ConsumerRebalanceListener prior to a Consumer Group Rebalance.
Which statement is correct?

A) Offsets are compacted.
B) Partitions assigned to a consumer may change.
C) Partition leaders may change.
D) Previous log files are deleted.

Solutions: