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Confluent CCDAK Exam (page: 1)
Confluent Certified Developer for Apache Kafka Certification Examination
Updated on: 12-Aug-2025

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CCDAK PDF 150 Questions

Where are the ACLs stored in a Kafka cluster by default?

  1. Inside the broker's data directory
  2. Under Zookeeper node /kafka-acl/
  3. In Kafka topickafka_acls
  4. Inside the Zookeeper's data directory

Answer(s): A

Explanation:

ACLs are stored in Zookeeper node /kafka-acls/ by default.



Is KSQL ANSI SQL compliant?

  1. Yes
  2. No

Answer(s): B

Explanation:

KSQL is not ANSI SQL compliant, for now there are no defined standards on streaming SQL languages



What information isn't stored inside of Zookeeper? (Select two)

  1. Schema Registry schemas
  2. Consumer offset
  3. ACL information
  4. Controller registration
  5. Broker registration info

Answer(s): B

Explanation:

Consumer offsets are stored in a Kafka topic consumer_offsets, and the Schema Registry stored schemas in the _schemas topic.



Which KSQL queries write to Kafka?

  1. COUNT and JOIN
  2. SHOW STREAMS and EXPLAIN <query> statements
  3. CREATE STREAM WITH <topic> and CREATE TABLE WITH <topic>
  4. CREATE STREAM AS SELECT and CREATE TABLE AS SELECT

Answer(s): C,D

Explanation:

SHOW STREAMS and EXPLAIN <query> statements run against the KSQL server that the KSQL client is connected to. They don't communicate directly with Kafka. CREATE STREAM WITH <topic> and CREATE TABLE WITH <topic> write metadata to the KSQL command topic. Persistent queries based on CREATE STREAM AS SELECT and CREATE TABLE AS SELECT read and write to Kafka topics. Non- persistent queries based on SELECT that are stateless only read from Kafka topics, for example SELECT … FROM foo WHERE …. Non-persistent queries that are stateful read and write to Kafka, for example, COUNT and JOIN. The data in Kafka is deleted automatically when you terminate the
query with CTRL-C.



There are two consumers C1 and C2 belonging to the same group G subscribed to topics T1 and T2. Each of the topics has 3 partitions. How will the partitions be assigned to consumers with Partition Assigner being Round Robin Assigner?

  1. C1 will be assigned partitions 0 and 2 from T1 and partition 1 from T2. C2 will have partition 1 from T1 and partitions 0 and 2 from T2.
  2. Two consumers cannot read from two topics at the same time
  3. C1 will be assigned partitions 0 and 1 from T1 and T2, C2 will be assigned partition 2 from T1 and T2.
  4. All consumers will read from all partitions

Answer(s): A

Explanation:

The correct option is the only one where the two consumers share an equal number of partitions amongst the two topics of three partitions. An interesting article to read is


Reference:

https://medium.com/@anyili0928/what-i-have-learned-from-kafka-partition-assignment-strategy-799fdf15d3ab



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