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Confluent CCDAK Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Kafka Streams | 20-25% | - State Stores and Processors - Transformation Operations (map, filter, join, aggregate) - Interactive Queries - Testing Kafka Streams Applications - Exactly-Once Processing - Windowed Operations (Tumbling, Hopping, Session) - Streams Architecture and Topology |
| Topic 2: 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) |
| Topic 3: Installing and Configuring Kafka | 5-10% | - Broker Configuration Parameters - ZooKeeper vs KRaft Mode - Topic Creation and Configuration - Partition Assignment Strategies |
| Topic 4: Kafka Fundamentals | 10-15% | - Brokers and Clusters - Log Segments and Retention - Replication Factor and ISR - Producer and Consumer Basics - Topics, Partitions, and Offsets |
| Topic 5: Schema Management | 5-10% | - Schema Evolution and Compatibility - Schema Registration and Retrieval - Avro Schemas - Schema Registry Architecture - Protobuf and JSON Schemas |
| Topic 6: Monitoring and Operations | 5-10% | - Kafka Metrics and Monitoring - Disaster Recovery - Log Compaction - Consumer Lag and Health Checks - Cross-region Replication |
| Topic 7: Security | 5-10% | - Authorization (ACLs) - Securing Schema Registry - Authentication (SASL, SSL/TLS) - Encryption in Transit |
| Topic 8: Kafka Connect | 10-15% | - Single Message Transformations (SMT) - Source and Sink Connectors - Offset Management in Connect - Converters and Transforms - Connector Configuration - Connect Architecture (Workers, Connectors, Tasks) |
| Topic 9: Developing with Kafka Producers | 15-20% | - Idempotent Producers - Partitioning Strategies - Producer Configuration and Tuning - Serialization (JSON, Avro, Protobuf) - Exactly-Once Semantics - Producer Interceptors - Error Handling and Retry Logic |
Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:
Question 1
You need to collect logs from a host and write them to a Kafka topic named 'logs-topic'. You decide to use Kafka Connect File Source connector for this task.
What is the preferred deployment mode for this connector?
A. Standalone mode
B. Parallel mode
C. SingleCluster mode
D. Distributed mode
Question 2
You create a topic named stream-logs with:
A replication factor of 3
Four partitions
Messages that are plain logs without a keyHow will messages be distributed across partitions?
A. The first message will always be written to partition 0.
B. Messages will be distributed among all the topic partitions with strict ordering.
C. All messages will be written to the same log segment.
D. Messages will be distributed round-robin among all the topic partitions.
Question 3
(You are writing a producer application and need to ensure proper delivery.
You configure the producer with acks=all.
Which two actions should you take to ensure proper error handling?
Select two.)
A. Surround the call to producer.send() with a try/catch block to catch KafkaException.
B. Check that producer.send() returned a RecordMetadata object and is not null.
C. Check the value of ProducerRecord.status().
D. Use a callback argument in producer.send() where you check delivery status.
Question 4
Which statement describes the storage location for a sink connector's offsets?
A. The topic specified in the offsets.storage.topic configuration parameter
B. The __consumer_offsets topic, like any other consumer
C. In a file specified by the offset.storage.file.filename configuration parameter
D. In memory which is then periodically flushed to a RocksDB instance
Question 5
You have a Kafka consumer in production actively reading from a critical topic.
You need to update the offset of your consumer to start reading from the beginning of the topic.
Which action should you take?
A. Update the consumer group's offset to the earliest position using the kafka-consumer-groups CLI tool.
B. Start a new consumer application with the same consumer group id.
C. Temporarily configure the topic's retention.ms parameter to 0 to empty the topic.
D. Update the consumer configuration by setting auto.offset.reset=earliest.
Solutions:
| Question 1 Answer: A | Question 2 Answer: D | Question 3 Answer: A,D | Question 4 Answer: B | Question 5 Answer: A |
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