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Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

1. Which is an optional field in an Avro record?

A) namespace
B) name
C) doc
D) fields

2. Your topic is log compacted and you are sending a message with the key K and value null. What will happen?

A) The broker will delete the message with the key K and null value only upon cleanup
B) The broker will delete all messages with the key K upon cleanup
C) The producer will throw a Runtime exception
D) The message will get ignored by the Kafka broker

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 new node can be added without stopping existing cluster nodes.
D) A newly added node will have KRaft controller role by default.

4. A producer application was sending messages to a partition with a replication factor of 2 by connecting to Broker 1 that was hosting partition leader. If the Broker 1 goes down, what will happen?

A) The producer will automatically produce to the broker that has been elected leader
B) The producer will stop working
C) The topic will be unavailable

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

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

Solutions: