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Confluent CCDAK Exam Syllabus Topics:

Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

1. Which two statements are correct when assigning partitions to the consumers in a consumer group using the assign() API?
(Select two.)

A) All topics must have the same number of partitions to use assign() API.
B) It is mandatory to subscribe to a topic before calling assign() to assign partitions.
C) The consumer chooses which partition to read without any assignment from brokers.
D) The consumer group will not be rebalanced if a consumer leaves the group.

2. You need to explain the best reason to implement the consumer callback interface ConsumerRebalanceListener prior to a Consumer Group Rebalance.
Which statement is correct?

A) Partition leaders may change.
B) Previous log files are deleted.
C) Partitions assigned to a consumer may change.
D) Offsets are compacted.

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 is the mechanism to distribute a topic's partitions across multiple brokers.
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 forces clients to enumerate every single broker in the cluster.

4. (You are developing a Java application that includes a Kafka consumer.
You need to integrate Kafka client logs with your own application logs.
Your application is using the Log4j2 logging framework.
Which Java library dependency must you include in your project?)

A) SLF4J implementation for Log4j2 (org.apache.logging.log4j:log4j-slf4j-impl)
B) SLF4J implementation for Log4j 1.2 (org.slf4j:slf4j-log4j12)
C) None, the correct dependency will be added transitively by the Kafka client
D) Just the Log4j2 dependency of the application

5. You have a Kafka consumer in production actively reading from a critical topic.
You need to update the offset of your consumer to start reading from the beginning of the topic.
Which action should you take?

A) Temporarily configure the topic's retention.ms parameter to 0 to empty the topic.
B) Update the consumer group's offset to the earliest position using the kafka-consumer-groups CLI tool.
C) Update the consumer configuration by setting auto.offset.reset=earliest.
D) Start a new consumer application with the same consumer group id.

Solutions: