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Confluent CCDAK Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Application Testing | 8% | - Mocking and test utilities - Integration testing and test clusters - Unit testing producers and consumers |
| Topic 2: Kafka Connect | 15% | - Source and sink connectors configuration - Connect architecture: workers, connectors, tasks, converters - Data transformation and integration patterns |
| Topic 3: Apache Kafka Streams | 12% | - Error handling and state management - Stream processing operations: map, filter, join, aggregation - Streams API concepts: topology, processors, state stores - Windowing and time semantics |
| 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: Apache Kafka Fundamentals | 23% | - Configuration basics and cluster setup - Delivery semantics: at-most-once, at-least-once, exactly-once - Kafka architecture and data flow - Core concepts: brokers, topics, partitions, replicas, offsets |
Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:
1. (What are two stateless operations in the Kafka Streams API?
Select two.)
A) Reduce
B) GroupBy
C) Join
D) Filter
2. (You are implementing a Kafka Streams application to process financial transactions.
Each transaction must be processed exactly once to ensure accuracy.
The application reads from an input topic, performs computations, and writes results to an output topic.
During testing, you notice duplicate entries in the output topic, which violates the exactly-once processing requirement.
You need to ensure exactly-once semantics (EOS) for this Kafka Streams application.
Which step should you take?)
A) Set enable.exactly_once=true in the Kafka Streams configuration.
B) Enable compaction on the output topic to handle duplicates.
C) Set enable.idempotence=true in the internal producer configuration of the Kafka Streams application.
D) Set processing.guarantee=exactly_once_v2 in the Kafka Streams configuration.
3. What is accomplished by producing data to a topic with a message key?
A) Kafka brokers allow you to add more partitions to a given topic, without impacting the data flow for existing keys.
B) Consumers can filter messages in real time based on the message key without processing unrelated messages.
C) Messages with the same key are routed to a deterministically selected partition, enabling order guarantees within that partition.
D) It provides a mechanism for encrypting messages at the partition level to ensure secure data transmission.
4. You need to consume messages from Kafka using the command-line interface (CLI).
Which command should you use?
A) kafka-get-messages
B) kafka-console-consumer
C) kafka-consume
D) kafka-consumer
5. (You are developing a Kafka Streams application with a complex topology that has multiple sources, processors, sinks, and sub-topologies.
You are working in a development environment and do not have access to a real Kafka cluster or topics.
You need to perform unit testing on your Kafka Streams application.
Which should you use?)
A) MockProducer, MockConsumer
B) TestProducer, TestConsumer
C) KafkaUnitTestDriver
D) TopologyTestDriver
Solutions:
| Question # 1 Answer: B,D | Question # 2 Answer: D | Question # 3 Answer: C | Question # 4 Answer: B | Question # 5 Answer: D |
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