Try and practice the latest Confluent : CCDAK real questions & answers
Updated: Oct 07, 2026
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Confluent CCDAK Exam Overview:
| Certification Vendor: | Confluent |
|---|---|
| Exam Name: | Confluent Certified Developer for Apache Kafka Certification Examination |
| Exam Number: | CCDAK |
| Available Languages: | English |
| Related Certifications: | Confluent Cloud Certified Operator (CCAC) Confluent Certified Administrator for Apache Kafka (CCAAK) |
| Exam Price: | $150 USD |
| Exam Duration: | 90 minutes |
| Exam Format: | List order, Multiple-choice, Matching |
| Passing Score: | Pass / Fail |
| Real Exam Qty: | 60 |
| Certificate Validity Period: | 2 years |
| Recommended Training: | Confluent Developer Training for Apache Kafka Confluent Documentation |
| Exam Registration: | Confluent Certification Portal |
| Sample Questions: | Confluent CCDAK Sample Questions |
| Exam Way: | Remote proctored online exam; requires webcam, microphone, Google Chrome browser |
| Pre Condition: | No mandatory prerequisites; recommended experience: 6+ months developing applications with Apache Kafka |
| Official Syllabus URL: | https://www.confluent.io/certification/ |
Confluent CCDAK Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Application Testing | 8% | - Mocking and test utilities - Unit testing producers and consumers - Integration testing and test clusters |
| Topic 2: Apache Kafka Streams | 12% | - Windowing and time semantics - Error handling and state management - Streams API concepts: topology, processors, state stores - Stream processing operations: map, filter, join, aggregation |
| Topic 3: Apache Kafka Fundamentals | 23% | - Delivery semantics: at-most-once, at-least-once, exactly-once - Configuration basics and cluster setup - Kafka architecture and data flow - Core concepts: brokers, topics, partitions, replicas, offsets |
| Topic 4: Application Observability | 13% | - Tracing and performance tuning - Error diagnosis and troubleshooting - Logging and monitoring metrics |
| Topic 5: Apache Kafka Application Development | 28% | - Schema management: Confluent Schema Registry, compatibility rules, evolution - Transactional messaging and idempotence - Consumer API: configuration, offset management, consumer groups, rebalancing - Producer API: configuration, serialization, partitioning, error handling |
| Topic 6: Kafka Connect | 15% | - Data transformation and integration patterns - Source and sink connectors configuration - Connect architecture: workers, connectors, tasks, converters |
Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:
What are two examples of performance metrics?
(Select two.)
- A. Number of active user sessions
- B. Time of last failed login
- C. fetch-rate
- D. incoming-byte-rate
- E. Number of active users
- F. total-login-attempts
Correct Answer: C,D 🗳️
Explanation: Only visible for Actual4Cert members. You can sign-up / login (it's free).
You are writing to a topic with acks=all.
The producer receives acknowledgments but you notice duplicate messages.
You find that timeouts due to network delay are causing resends.
Which configuration should you use to prevent duplicates?
- A. retries=0max.in.flight.requests.per.connection=5enable.idempotence=true
- B. enable.auto.commit=true
- C. retries=2147483647max.in.flight.requests.per.connection=5enable.idempotence=true
- D. retries=2147483647max.in.flight.requests.per.connection=1enable.idempotence=false
Correct Answer: C 🗳️
Explanation: Only visible for Actual4Cert members. You can sign-up / login (it's free).
Which two statements are correct when assigning partitions to the consumers in a consumer group using the assign() API?
(Select two.)
- A. The consumer chooses which partition to read without any assignment from brokers.
- B. It is mandatory to subscribe to a topic before calling assign() to assign partitions.
- C. The consumer group will not be rebalanced if a consumer leaves the group.
- D. All topics must have the same number of partitions to use assign() API.
Correct Answer: A,C 🗳️
Explanation: Only visible for Actual4Cert members. You can sign-up / login (it's free).
(You are experiencing low throughput from a Java producer.
Kafka producer metrics show a low I/O thread ratio and low I/O thread wait ratio.
What is the most likely cause of the slow producer performance?)
- A. Compression is enabled.
- B. The producer code has an expensive callback function.
- C. The producer is sending large batches of messages.
- D. There is a bad data link layer (Layer 2) connection from the producer to the cluster.
Correct Answer: B 🗳️
Explanation: Only visible for Actual4Cert members. You can sign-up / login (it's free).
You use Kafka Connect with the JDBC source connector to extract data from a large database and push it into Kafka.
The database contains tens of tables, and the current connector is unable to process the data fast enough.
You add more Kafka Connect workers, but throughput doesn't improve.
What should you do next?
- A. Increase the value of the connector's property tasks.max.
- B. Modify the database schemas to enable horizontal sharding.
- C. Add more Kafka brokers to the cluster.
- D. Increase the number of Kafka partitions for the topics.
Correct Answer: A 🗳️
Explanation: Only visible for Actual4Cert members. You can sign-up / login (it's free).
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