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Confluent CCDAK Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Kafka Connect | 15% | - Data transformation and integration patterns - Connect architecture: workers, connectors, tasks, converters - Source and sink connectors configuration |
| Topic 2: Application Observability | 13% | - Tracing and performance tuning - Error diagnosis and troubleshooting - Logging and monitoring metrics |
| Topic 3: Apache Kafka Streams | 12% | - Error handling and state management - Windowing and time semantics - Streams API concepts: topology, processors, state stores - Stream processing operations: map, filter, join, aggregation |
| Topic 4: Application Testing | 8% | - Unit testing producers and consumers - Integration testing and test clusters - Mocking and test utilities |
| Topic 5: Apache Kafka Application Development | 28% | - Schema management: Confluent Schema Registry, compatibility rules, evolution - Consumer API: configuration, offset management, consumer groups, rebalancing - Producer API: configuration, serialization, partitioning, error handling - Transactional messaging and idempotence |
| 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:
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, no other action needed.
- B. Log the bad record and seek the consumer to the offset of the next record.
- C. Throw a runtime exception to trigger a restart of the application.
- D. Log the bad record and call the consumer.skip() method.
Correct Answer: B 🗳️
Explanation: Only visible for Actual4Exams members. You can sign-up / login (it's free).
You are developing a Java application using a Kafka consumer.
You need to integrate Kafka's client logs with your own application's logs using log4j2.
Which Java library dependency must you include in your project?
- A. None, the right dependency will be added by the Kafka client dependency by transitivity.
- B. SLF4J implementation for Log4j2 (org.apache.logging.log4j:log4j-slf4j-impl)
- C. Just the log4j2 dependency of the application
- D. SLF4J implementation for Log4j 1.2 (org.slf4j:slf4j-log4j12)
Correct Answer: B 🗳️
Explanation: Only visible for Actual4Exams members. You can sign-up / login (it's free).
(You are writing to a Kafka topic with producer configuration acks=all.
The producer receives acknowledgements from the broker but still creates duplicate messages due to network timeouts and retries.
You need to ensure that duplicate messages are not created.
Which producer configuration should you set?)
- A. retries=0max.in.flight.requests.per.connection=5enable.idempotence=true
- B. retries=2147483647max.in.flight.requests.per.connection=5enable.idempotence=false
- C. retries=2147483647max.in.flight.requests.per.connection=1enable.idempotence=true
- D. enable.auto.commit=true
Correct Answer: C 🗳️
Explanation: Only visible for Actual4Exams members. You can sign-up / login (it's free).
(A consumer application runs once every two weeks and reads from a Kafka topic.
The last time the application ran, the last offset processed was 217.
The application is configured with auto.offset.reset=latest.
The current offsets in the topic start at 318 and end at 588.
Which offset will the application start reading from when it starts up for its next run?)
- A. 589
- B. 318
- C. 218
- D. 0
Correct Answer: A 🗳️
Explanation: Only visible for Actual4Exams members. You can sign-up / login (it's free).
(You want to read messages from all partitions of a topic in every consumer instance of your application.
How do you do this?)
- A. Use the subscribe() method with a regular expression argument.
- B. Use the assign() method using all topic-partitions of the topic as argument.
- C. Use the assign() method with the topic name as argument.
- D. Use the subscribe() method with an empty consumer group name configuration.
Correct Answer: B 🗳️
Explanation: Only visible for Actual4Exams members. You can sign-up / login (it's free).
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