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Confluent CCDAK Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Kafka Streams | 20-25% | - State Stores and Processors - Exactly-Once Processing - Transformation Operations (map, filter, join, aggregate) - Interactive Queries - Streams Architecture and Topology - Windowed Operations (Tumbling, Hopping, Session) - Testing Kafka Streams Applications |
| Topic 2: Developing with Kafka Consumers | 15-20% | - Deserialization - Consumer Configuration and Tuning - Consumer Interceptors - Commit Strategies (Auto, Manual, Cooperative) - Consumer Groups and Rebalancing - Offset Management - Multi-threaded Consumers |
| Topic 3: Developing with Kafka Producers | 15-20% | - Serialization (JSON, Avro, Protobuf) - Producer Interceptors - Partitioning Strategies - Error Handling and Retry Logic - Idempotent Producers - Exactly-Once Semantics - Producer Configuration and Tuning |
| Topic 4: Security | 5-10% | - Authentication (SASL, SSL/TLS) - Authorization (ACLs) - Securing Schema Registry - Encryption in Transit |
| Topic 5: Schema Management | 5-10% | - Schema Registration and Retrieval - Protobuf and JSON Schemas - Schema Evolution and Compatibility - Avro Schemas - Schema Registry Architecture |
| Topic 6: Monitoring and Operations | 5-10% | - Consumer Lag and Health Checks - Kafka Metrics and Monitoring - Disaster Recovery - Cross-region Replication - Log Compaction |
| Topic 7: Installing and Configuring Kafka | 5-10% | - Broker Configuration Parameters - Topic Creation and Configuration - ZooKeeper vs KRaft Mode - Partition Assignment Strategies |
| Topic 8: Kafka Fundamentals | 10-15% | - Replication Factor and ISR - Brokers and Clusters - Log Segments and Retention - Topics, Partitions, and Offsets - Producer and Consumer Basics |
| Topic 9: Kafka Connect | 10-15% | - Connector Configuration - Connect Architecture (Workers, Connectors, Tasks) - Single Message Transformations (SMT) - Source and Sink Connectors - Offset Management in Connect - Converters and Transforms |
Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:
Which two statements are correct about transactions in Kafka?
(Select two.)
- A. Consumers can consume both committed and uncommitted transactions.
- B. Transactions guarantee at least once delivery of messages.
- C. Transactions are only possible when writing messages to a topic with single partition.
- D. All messages from a failed transaction will be deleted from a Kafka topic.
- E. Information about producers and their transactions is stored in the _transaction_state topic.
Correct Answer: A,E 🗳️
Explanation: Only visible for VCE4Plus members. You can sign-up / login (it's free).
You need to consume messages from Kafka using the command-line interface (CLI).
Which command should you use?
- A. kafka-get-messages
- B. kafka-consumer
- C. kafka-console-consumer
- D. kafka-consume
Correct Answer: C 🗳️
Explanation: Only visible for VCE4Plus members. You can sign-up / login (it's free).
You need to set alerts on key broker metrics to trigger notifications when the cluster is unhealthy.
Which are three minimum broker metrics to monitor?
(Select three.)
- A. kafka.controller:type=KafkaController,name=OfflinePartitionsCount
- B. kafka.controller:type=KafkaController,name=LastCommittedRecordOffset
- C. kafka.controller:type=ControllerStats,name=UncleanLeaderElectionsPerSec
- D. kafka.controller:type=KafkaController,name=TopicsToDeleteCount
- E. kafka.controller:type=KafkaController,name=ActiveControllerCount
Correct Answer: A,C,E 🗳️
Explanation: Only visible for VCE4Plus members. You can sign-up / login (it's free).
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. The number of bytes that overflowed beyond a producer batch of messages
- B. The ID of the partition to which the message was committed
- C. The sequential ID of the message committed into a partition
- D. Its position in the producer's batch of messages
Correct Answer: C 🗳️
Explanation: Only visible for VCE4Plus members. You can sign-up / login (it's free).
(You need to send a JSON message on the wire. The message key is a string.
How would you do this?)
- A. Specify a value serializer class for the JSON contents of the message's value. Set the key serializer class to JSON.
- B. Specify a value serializer class for the JSON contents of the message's value. Set the key serializer class to null.
- C. Specify a value serializer class for the JSON contents of the message's value. Set a key serializer for the string value.
- D. Specify a key serializer class for the JSON contents of the message's value. Set the value serializer class to null.
Correct Answer: C 🗳️
Explanation: Only visible for VCE4Plus members. You can sign-up / login (it's free).
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