CCDAK Exam Dumps : Confluent Certified Developer for Apache Kafka Certification Examination

If a key isnot specified, thedefault Kafka partitioner uses round-robinlogic to assign partitions. This leads toeven distributionof messages across all partitions.

FromKafka Producer Design:

“If the key is null, the producer will assign the partition in a round-robin fashion to achieve load balancing.”

There isno error, and partition 0 isnot alwayschosen in this case.

Kafka Connectsource connectorsuse theoffset.storage.topicconfiguration parameter to define where to storeoffsets that track the connector's positionin the source system (e.g., database, file, etc.).

FromKafka Connect Worker Configuration:

“offset.storage.topic specifies the topic in Kafka where the connector stores offsets for each source partition.”

This allows Kafka Connect toresumefrom the correct position on restart.

The other options (B–D) are not valid Kafka configs.

RetriableException is a subclass of KafkaException, indicating transient issues thatmight succeed if retried. Examples include:

LeaderNotAvailableException: Happens when metadata is not yet propagated or leader election is in progress.

NotEnoughReplicasException: Happens when the number of in-sync replicas is insufficient. This can be transient if replicas come back online.

From theApache Kafka Java Client documentation:

"These exceptions (like LeaderNotAvailableException, NotEnoughReplicasException) are transient and the client will retry them automatically depending on retry configuration."

RecordTooLargeExceptionandAuthorizationExceptionarenon-retriableas they indicate client-side or permission errors.