Confluent CCDAK : Confluent Certified Developer for Apache Kafka Certification Examination
- Exam Code: CCDAK
- Exam Name: Confluent Certified Developer for Apache Kafka Certification Examination
- Updated: Nov 05, 2026
- Q & A: 92 Questions and Answers
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Confluent CCDAK Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Apache Kafka Application Development | 28% | - Transactional messaging and idempotence - Consumer API: configuration, offset management, consumer groups, rebalancing - Producer API: configuration, serialization, partitioning, error handling - Schema management: Confluent Schema Registry, compatibility rules, evolution |
| Topic 2: Apache Kafka Streams | 12% | - Windowing and time semantics - Stream processing operations: map, filter, join, aggregation - Streams API concepts: topology, processors, state stores - Error handling and state management |
| Topic 3: Application Testing | 8% | - Integration testing and test clusters - Mocking and test utilities - Unit testing producers and consumers |
| Topic 4: Apache Kafka Fundamentals | 23% | - Configuration basics and cluster setup - Core concepts: brokers, topics, partitions, replicas, offsets - Kafka architecture and data flow - Delivery semantics: at-most-once, at-least-once, exactly-once |
| Topic 5: Kafka Connect | 15% | - Source and sink connectors configuration - Data transformation and integration patterns - Connect architecture: workers, connectors, tasks, converters |
| Topic 6: Application Observability | 13% | - Logging and monitoring metrics - Tracing and performance tuning - Error diagnosis and troubleshooting |
Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:
A stream processing application is tracking user activity in online shopping carts.
You want to identify periods of user inactivity.
Which type of Kafka Streams window should you use?
- A. Tumbling
- B. Sliding
- C. Hopping
- D. Session
Correct Answer: D 🗳️
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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. Update the consumer group's offset to the earliest position using the kafka-consumer-groups CLI tool.
- B. Temporarily configure the topic's retention.ms parameter to 0 to empty the topic.
- C. Start a new consumer application with the same consumer group id.
- D. Update the consumer configuration by setting auto.offset.reset=earliest.
Correct Answer: A 🗳️
Explanation: Only visible for Exams4Collection members. You can sign-up / login (it's free).
You need to correctly join data from two Kafka topics.
Which two scenarios will allow for co-partitioning?
(Select two.)
- A. Both topics have the same number of partitions.
- B. Both topics have the same key and partitioning strategy.
- C. Both topics have the same retention time.
- D. Both topics have the same value schema.
Correct Answer: A,B 🗳️
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Your application is consuming from a topic configured with a deserializer.
It needs to be resilient to badly formatted records ("poison pills"). You surround the poll() call with a try/catch for RecordDeserializationException.
You need to log the bad record, skip it, and continue processing.
Which action should you take in the catch block?
- A. Log the bad record and seek the consumer to the offset of the next record.
- B. Log the bad record and call the consumer.skip() method.
- C. Log the bad record, no other action needed.
- D. Throw a runtime exception to trigger a restart of the application.
Correct Answer: A 🗳️
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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. NotEnoughReplicasException
- B. NotLeaderForPartitionException
- C. NetworkException
- D. NotCoordinatorException
Correct Answer: A 🗳️
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