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Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

1. What does producing data to a topic with a message key allow?

A) Producers to add extra metadata with the message
B) Messages to be secured with encryption
C) Messages to have a strategy for partition assignment
D) Consumers to subscribe to a message with a specific key

2. In the Kafka consumer metrics it is observed that fetch-rate is very high and each fetch is small. What steps will you take to increase throughput?

A) Decrease fetch.max.bytes
B) Increase fetch.min.bytes
C) Decrease fetch.min.bytes
D) Increase fetch.max.bytes
E) Increase fetch.max.wait

3. By default, which replica will be elected as a partition leader? (select two)

A) An in-sync replica
B) Any of the replicas
C) Preferred leader broker if it is in-sync and auto.leader.rebalance.enable=false
D) Preferred leader broker if it is in-sync and auto.leader.rebalance.enable=true

4. If you enable an SSL endpoint in Kafka, what feature of Kafka will be lost?

A) Exactly-once delivery
B) Cross-cluster mirroring
C) Support for Avro format
D) Zero copy

5. A consumer application is using KafkaAvroDeserializer to deserialize Avro messages. What happens if message schema is not present in AvroDeserializer local cache?

A) Fails silently
B) Throws DeserializationException
C) Throws SerializationException
D) Fetches schema from Schema Registry

Solutions: