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Confluent CCDAK Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Application Testing | 8% | - Unit testing producers and consumers - Integration testing and test clusters - Mocking and test utilities |
| Topic 2: Apache Kafka Application Development | 28% | - Schema management: Confluent Schema Registry, compatibility rules, evolution - Producer API: configuration, serialization, partitioning, error handling - Transactional messaging and idempotence - Consumer API: configuration, offset management, consumer groups, rebalancing |
| Topic 3: Application Observability | 13% | - Tracing and performance tuning - Logging and monitoring metrics - Error diagnosis and troubleshooting |
| Topic 4: Apache Kafka Streams | 12% | - Stream processing operations: map, filter, join, aggregation - Windowing and time semantics - Error handling and state management - Streams API concepts: topology, processors, state stores |
| Topic 5: Kafka Connect | 15% | - Data transformation and integration patterns - Source and sink connectors configuration - Connect architecture: workers, connectors, tasks, converters |
| Topic 6: Apache Kafka Fundamentals | 23% | - Kafka architecture and data flow - Configuration basics and cluster setup - Core concepts: brokers, topics, partitions, replicas, offsets - Delivery semantics: at-most-once, at-least-once, exactly-once |
Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:
1. You have a Kafka client application that has real-time processing requirements.
Which Kafka metric should you monitor?
A) Aggregate incoming byte rate
B) Total time to serve requests to replica followers
C) Consumer heartbeat rate to group coordinator
D) Consumer lag between brokers and consumers
2. The producer code below features a Callback class with a method called onCompletion().
In the onCompletion() method, when the request is completed successfully, what does the value metadata.
offset() represent?
A) Its position in the producer's batch of messages
B) The number of bytes that overflowed beyond a producer batch of messages
C) The sequential ID of the message committed into a partition
D) The ID of the partition to which the message was committed
3. (You create a topic with five partitions.
What can you assume about messages read from that topic by a single consumer group?)
A) Messages from one partition can be consumed by any of the consumers in a group for faster processing.
B) All messages will be read from exactly one broker by the consumer group.
C) The consumer group can only read the same number of messages from all the partitions.
D) Messages can be consumed by a maximum of five consumers in the same consumer group.
4. You are composing a REST request to create a new connector in a running Connect cluster. You invoke POST /connectors with a configuration and receive a 409 (Conflict) response.
What are two reasons for this response? (Select two.)
A) The connect cluster has reached capacity, and new connectors cannot be created without expanding the cluster.
B) The Connect cluster is in process of rebalancing.
C) The connector configuration was invalid, and the response body will expand on the configuration error.
D) The Connector already exists in the cluster.
5. 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 number of Kafka partitions for the topics.
B) Increase the value of the connector's property tasks.max.
C) Modify the database schemas to enable horizontal sharding.
D) Add more Kafka brokers to the cluster.
Solutions:
| Question # 1 Answer: D | Question # 2 Answer: C | Question # 3 Answer: D | Question # 4 Answer: B,D | Question # 5 Answer: B |
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