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Confluent CCDAK Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: Kafka Connect15%- Data transformation and integration patterns
- Source and sink connectors configuration
- Connect architecture: workers, connectors, tasks, converters
Topic 2: Application Observability13%- Tracing and performance tuning
- Logging and monitoring metrics
- Error diagnosis and troubleshooting
Topic 3: Apache Kafka Fundamentals23%- Core concepts: brokers, topics, partitions, replicas, offsets
- Configuration basics and cluster setup
- Kafka architecture and data flow
- Delivery semantics: at-most-once, at-least-once, exactly-once
Topic 4: Apache Kafka Streams12%- Windowing and time semantics
- Streams API concepts: topology, processors, state stores
- Stream processing operations: map, filter, join, aggregation
- Error handling and state management
Topic 5: Application Testing8%- Unit testing producers and consumers
- Mocking and test utilities
- Integration testing and test clusters
Topic 6: Apache Kafka Application Development28%- Consumer API: configuration, offset management, consumer groups, rebalancing
- Schema management: Confluent Schema Registry, compatibility rules, evolution
- Transactional messaging and idempotence
- Producer API: configuration, serialization, partitioning, error handling

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Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions (Q23-Q28):

NEW QUESTION # 23
What information isn't stored inside of Zookeeper? (select two)

Answer: E

Explanation:
Consumer offsets are stored in a Kafka topic __consumer_offsets, and the Schema Registry stored schemas in the _schemas topic.


NEW QUESTION # 24
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.)

Answer: B,D

Explanation:
A409 Conflictresponse in Kafka Connect REST API usually means:
* The connector name provided already exists (i.e., a connector with that name is already deployed).
* The Kafka Connect cluster is temporarily unavailable to accept new tasks due toa rebalance in progress.
From theConfluent Developer documentationand Kafka Connect REST API spec:
"409 - Conflict. The connector name is already in use or the worker group is in the process of rebalancing and cannot complete the request at this time." Option A is incorrect because invalid configurations return400 Bad Request, not 409.
Option B is invalid because Kafka Connect does not have a strict concept of "capacity" that prevents connector creation with a 409.
Reference:Apache Kafka Connect REST API documentation


NEW QUESTION # 25
A bank uses a Kafka cluster for credit card payments. What should be the value of the property unclean.leader.election.enable?

Answer: B

Explanation:
Setting unclean.leader.election.enable to true means we allow out-of-sync replicas to become leaders, we will lose messages when this occurs, effectively losing credit card payments and making our customers very angry.


NEW QUESTION # 26
You want to perform table lookups against a KTable everytime a new record is received from the KStream. What is the output of KStream-KTable join?

Answer: A

Explanation:
Here KStream is being processed to create another KStream.


NEW QUESTION # 27
How do you create a topic named test with 3 partitions and 3 replicas using the Kafka CLI?

Answer: C

Explanation:
As of Kafka 2.3, the kafka-topics.sh command can take --bootstrap-server localhost:9092 as an argument. You could also use the (now deprecated) option of --zookeeper localhost:2181.


NEW QUESTION # 28
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