Confluent Certified Developer for Apache Kafka

Here you have the best Confluent CCDAK practice exam questions

You have 70 total questions across 14 pages (5 per page)
These questions were last updated on February 20, 2026
This site is not affiliated with or endorsed by Confluent.

Question 1 of 70

You need to consume messages from Kafka using the command-line interface (CLI).
Which command should you use?

kafka-console-consumer

kafka-consumer

kafka-get-message

kafka- consume

Question 2 of 70

You are experiencing low throughput from a Java producer. You monitor the Kafka metrics and notice that the metrics for that producer show low I/O thread ratio and low I/O thread wait ratio.
What is the most likely the cause of the slow producer performance?

Compression is enabled.

The producer is sending large batches of messages.

There is a bad data link layer (layer 2) connection from the producer to the cluster.

The producer code has an expensive callback function.

Question 3 of 70

Which configuration is valid for deploying a JDBC Source Connector to read all the rows from orders table and write it to db1-orders topic?

{
"name":"jdbc-source",
"connector.class": "io.confluent.connect.jdbc.JdbcSourceConnector",
"tasks.max": "1",
"connection.url": "jdbc:mysql://mysql:3306/db1?user=user&password=password&useSSL=false",
"topic.prefix": "db1-",
"table.whitelist": "orders"
}

{
"name":"db1-orders".
"connector.class": "io.confluent.connect.jdbc.JdbcSourceConnector",
"tasks.max": "1",
"connection.url": "jdbc:mysql://mysql:3306/db1?user=user&password=password&useSSL=false",
"topic.prefix": "db1-",
"table.blacklist": "ord*"
}

{
"name":"orders-connect",
"connector.class": "io.confluent.connect.jdbc.JdbcSourceConnector",
"tasks.max": "1",
"connection.url": "jdbc:mysql://mysql:3306/db1",
"topic.whitelist": "orders",
"auto.create": "true"
}

{
"name":"jdbc-source",
"connector.class": "io.confluent.connect.jdbc.JdbcSourceConnector",
"tasks.max": "1",
"connection.url": "jdbc:mysql://mysql:3306/db1?user=user&useAutoAuthentication=true", "topic.prefix": "db1-",
"table.whitelist": "orders"
}

Question 4 of 70

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 Topic.
You need to perform Unit Test on your Kafka Streams application.
Which should you use?

TopologyTestDriver

MockProducer, MockConsumer

TestProducer, TestСonsumer

KafkaUnitTestDriver

Question 5 of 70

Which two statements are correct about transactions in Kafka? (Choose two.)

All messages from a failed transaction will be deleted from a Kafka topic.

Transactions are only possible when writing messages to a topic with single partition.

Consumers can consume both committed and uncommitted transactions.

Information about producers and their transactions is stored in the '__transaction_state' topic.

Transactions guarantee at least once delivery of messages.

About the Confluent CCDAK Certification Exam

About the Exam

The Confluent CCDAK (Confluent Certified Developer for Apache Kafka) validates your knowledge and skills. Passing demonstrates proficiency and can boost your career prospects in the field.

How to Prepare

Work through all 70 practice questions across 14 pages. Focus on understanding the reasoning behind each answer rather than memorizing responses to be ready for any variation on the real exam.

Why Practice Exams?

Practice exams help you familiarize yourself with the question format, manage your time, and reduce anxiety on the test day. Our CCDAK questions are regularly updated to reflect the latest exam objectives.