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Confluent CCDAK Exam Syllabus Topics:

Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

1. (You are developing a Kafka Streams application with a complex topology that has multiple sources, processors, sinks, and sub-topologies.
You are working in a development environment and do not have access to a real Kafka cluster or topics.
You need to perform unit testing on your Kafka Streams application.
Which should you use?)

A) TestProducer, TestConsumer
B) MockProducer, MockConsumer
C) TopologyTestDriver
D) KafkaUnitTestDriver

2. An application is consuming messages from Kafka.
The application logs show that partitions are frequently being reassigned within the consumer group.
Which two factors may be contributing to this?
(Select two.)

A) An instance of the application is crashing and being restarted.
B) There is a storage issue on the broker.
C) The number of partitions does not match the number of application instances.
D) There is a slow consumer processing application.

3. You are working on a Kafka cluster with three nodes. You create a topic named orders with:
replication.factor = 3
min.insync.replicas = 2
acks = allWhat exception will be generated if two brokers are down due to network delay?

A) NotLeaderForPartitionException
B) NetworkException
C) NotEnoughReplicasException
D) NotCoordinatorException

4. You are experiencing low throughput from a Java producer.
Metrics show low I/O thread ratio and low I/O thread wait ratio.
What is the most likely cause of the slow producer performance?

A) The producer code has an expensive callback function.
B) The producer is sending large batches of messages.
C) There is a bad data link layer (layer 2) connection from the producer to the cluster.
D) Compression is enabled.

5. (You need to send a JSON message on the wire. The message key is a string.
How would you do this?)

A) Specify a value serializer class for the JSON contents of the message's value. Set the key serializer class to JSON.
B) Specify a key serializer class for the JSON contents of the message's value. Set the value serializer class to null.
C) Specify a value serializer class for the JSON contents of the message's value. Set a key serializer for the string value.
D) Specify a value serializer class for the JSON contents of the message's value. Set the key serializer class to null.

Solutions: