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Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

1. How will you find out all the partitions without a leader?

A) kafka-topics.sh --zookeeper localhost:2181 --describe --unavailable-partitions
B) kafka-topics.sh --bootstrap-server localhost:2181 --describe --unavailable-partitions
C) kafka-topics.sh --broker-list localhost:9092 --describe --under-replicated-partitions
D) kafka-topics.sh --zookeeper localhost:2181 --describe --under-replicated-partitions

2. Where are source connector offsets stored?

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

3. Clients that connect to a Kafka cluster are required to specify one or more brokers in the bootstrap.
servers parameter.
What is the primary advantage of specifying more than one broker?

A) It forces clients to enumerate every single broker in the cluster.
B) It provides the ability to wake up dormant brokers.
C) It provides redundancy in making the initial connection to the Kafka cluster.
D) It is the mechanism to distribute a topic's partitions across multiple brokers.

4. A stream processing application is consuming from a topic with five partitions. You run three instances of the application. Each instance has num.stream.threads=5.
You need to identify the number of stream tasks that will be created and how many will actively consume messages from the input topic.

A) 5 created, 5 actively consuming
B) 15 created, 5 actively consuming
C) 15 created, 15 actively consuming
D) 5 created, 1 actively consuming

5. A producer is configured with the default partitioner. It is sending records to a topic that is configured with five partitions. The record does not contain any key.
What is the result of this?

A) An error will be raised and no record will be sent.
B) Records will be sent to the least used partition.
C) Records will be dispatched among the available partitions.
D) Records will be sent to partition 0.

Solutions: