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Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

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

2. We have a store selling shoes. What dataset is a great candidate to be modeled as a KTable in Kafka Streams?

A) Money made until now
B) The transaction stream
C) Items returned
D) Inventory contents right now

3. Your company has three Kafka clusters: Development, Testing, and Production.
The Production cluster is running out of storage, so you add a new node.
Which two statements about the new node are true?
(Select two.)

A) A new node will not have any partitions assigned to it unless a new topic is created or reassignment occurs.
B) A node ID will be assigned to the new node automatically.
C) A newly added node will have KRaft controller role by default.
D) A new node can be added without stopping existing cluster nodes.

4. In Java, Avro SpecificRecords classes are

A) written manually by the programmer
B) automatically generated from an Avro Schema + a Maven / Gradle Plugin
C) automatically generated from an Avro Schema

5. You have a Kafka client application that has real-time processing requirements.
Which Kafka metric should you monitor?

A) Total time to serve requests to replica followers
B) Consumer lag between brokers and consumers
C) Aggregate incoming byte rate
D) Consumer heartbeat rate to group coordinator

Solutions: