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Confluent CCDAK Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Developing with Kafka Producers | 15-20% | - Partitioning Strategies - Idempotent Producers - Error Handling and Retry Logic - Exactly-Once Semantics - Producer Configuration and Tuning - Serialization (JSON, Avro, Protobuf) - Producer Interceptors |
| Security | 5-10% | - Securing Schema Registry - Encryption in Transit - Authorization (ACLs) - Authentication (SASL, SSL/TLS) |
| Kafka Fundamentals | 10-15% | - Topics, Partitions, and Offsets - Brokers and Clusters - Replication Factor and ISR - Producer and Consumer Basics - Log Segments and Retention |
| Kafka Connect | 10-15% | - Offset Management in Connect - Single Message Transformations (SMT) - Connect Architecture (Workers, Connectors, Tasks) - Converters and Transforms - Connector Configuration - Source and Sink Connectors |
| Schema Management | 5-10% | - Schema Registry Architecture - Schema Evolution and Compatibility - Protobuf and JSON Schemas - Schema Registration and Retrieval - Avro Schemas |
| Installing and Configuring Kafka | 5-10% | - Broker Configuration Parameters - ZooKeeper vs KRaft Mode - Partition Assignment Strategies - Topic Creation and Configuration |
| Developing with Kafka Consumers | 15-20% | - Deserialization - Consumer Groups and Rebalancing - Consumer Interceptors - Offset Management - Multi-threaded Consumers - Consumer Configuration and Tuning - Commit Strategies (Auto, Manual, Cooperative) |
| Kafka Streams | 20-25% | - State Stores and Processors - Exactly-Once Processing - Interactive Queries - Transformation Operations (map, filter, join, aggregate) - Windowed Operations (Tumbling, Hopping, Session) - Testing Kafka Streams Applications - Streams Architecture and Topology |
| Monitoring and Operations | 5-10% | - Kafka Metrics and Monitoring - Cross-region Replication - Disaster Recovery - Consumer Lag and Health Checks - Log Compaction |
Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:
(You need to set alerts on key broker metrics to trigger notifications when a Kafka cluster is unhealthy.
What are three minimum broker metrics to monitor for cluster health?
Select three.)
- A. kafka.controller:type=KafkaController,name=ActiveControllerCount
- 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=OfflinePartitionsCount
Correct Answer: A,C,E 🗳️
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(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 a key serializer for the string value.
- B. Specify a key serializer class for the JSON contents of the message's value. Set the value serializer class to null.
- C. Specify a value serializer class for the JSON contents of the message's value. Set the key serializer class to null.
- D. Specify a value serializer class for the JSON contents of the message's value. Set the key serializer class to JSON.
Correct Answer: A 🗳️
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(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. TopologyTestDriver
- B. KafkaUnitTestDriver
- C. MockProducer, MockConsumer
- D. TestProducer, TestConsumer
Correct Answer: A 🗳️
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Your company has three Kafka clusters: Development, Testing, and Production.
The Production cluster is running out of storage, so you add a new node.
Which two statements about the new node are true?
(Select two.)
- A. A new node can be added without stopping existing cluster nodes.
- B. A node ID will be assigned to the new node automatically.
- C. A new node will not have any partitions assigned to it unless a new topic is created or reassignment occurs.
- D. A newly added node will have KRaft controller role by default.
Correct Answer: A,C 🗳️
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You have a Kafka Connect cluster with multiple connectors.
One connector is not working as expected.
How can you find logs related to that specific connector?
- A. Make no change, there is no way to find logs other than by stopping all the other connectors.
- B. Modify the log4j.properties file to enable connector context.
- C. Modify the log4j.properties file to add a dedicated log appender for the connector.
- D. Change the log level to DEBUG to have connector context information in logs.
Correct Answer: C 🗳️
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