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Confluent CCDAK Exam Syllabus Topics:

SectionObjectives
Topic 1: Kafka Fundamentals- Data flow in Kafka
  • 1. Producer and consumer model
    • 2. Offset management
      - Kafka architecture and core concepts
      • 1. Replication and fault tolerance
        • 2. Brokers, topics, partitions
          Topic 2: Kafka Producers and Consumers- Producer API
          • 1. Serialization and partitioning strategies
            • 2. Reliability and acknowledgments
              - Consumer API
              • 1. Consumer groups
                • 2. Rebalancing and offset commits
                  Topic 3: Kafka Streams and Processing- Event processing patterns
                  • 1. Windowing and aggregation
                    • 2. Exactly-once semantics
                      - Kafka Streams API
                      • 1. Stateful vs stateless processing
                        • 2. Stream processing fundamentals
                          Topic 4: Kafka Ecosystem and Confluent Platform- ksqlDB and connectors
                          • 1. Stream querying concepts
                            • 2. Kafka Connect basics
                              - Schema Registry
                              • 1. Avro, Protobuf, JSON Schema usage

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                                Real CCDAK Exams | CCDAK Test Assessment

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                                Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions (Q67-Q72):

                                NEW QUESTION # 67
                                (An S3 source connector named s3-connector stopped running.
                                You use the Kafka Connect REST API to query the connector and task status.
                                One of the three tasks has failed.
                                You need to restart the connector and all currently running tasks.
                                Which REST request will restart the connector instance and all its tasks?)

                                Answer: D

                                Explanation:
                                According to the official Apache Kafka Connect REST API documentation, restarting a connector can be done at different granularities: connector-level, task-level, or both. By default, calling POST /connectors/
                                {name}/restart only restarts the connector instance, not its tasks.
                                To restart the connector and all of its tasks, the request must explicitly include the query parameter includeTasks=true. This instructs Kafka Connect to restart the connector and all associated tasks, regardless of whether they are currently running or failed.
                                Option B (onlyFailed=true) limits the restart to only failed tasks, which does not meet the requirement to restart all tasks. Option C restarts only the connector instance, leaving tasks untouched. Option D restarts a single specific task and does not restart the connector itself.
                                Therefore, the correct and officially documented REST request to restart the connector instance and all tasks is:
                                POST /connectors/s3-connector/restart?includeTasks=true
                                This ensures a full restart of the connector and its execution context across the Kafka Connect cluster.


                                NEW QUESTION # 68
                                There are two consumers C1 and C2 belonging to the same group G subscribed to topics T1 and T2. Each of the topics has 3 partitions. How will the partitions be assigned to consumers with Partition Assigner being Round Robin Assigner?

                                Answer: D

                                Explanation:
                                The correct option is the only one where the two consumers share an equal number of partitions amongst the two topics of three partitions. An interesting article to read ishttps://medium.com/@anyili0928/what-i-have-learned-from-kafka-partition-assignment-strategy-799fdf15d3ab


                                NEW QUESTION # 69
                                How will you set the retention for the topic named 'Aumy-topic' to 1 hour?

                                Answer: B

                                Explanation:
                                retention.ms can be configured at topic level while creating topic or by altering topic. It shouldn't be set at the broker level (log.retention.ms) as this would impact all the topics in the cluster, not just the one we are interested in


                                NEW QUESTION # 70
                                You have a consumer group of 12 consumers and when a consumer gets killed by the process management system, rather abruptly, it does not trigger a graceful shutdown of your consumer. Therefore, it takes up to 10 seconds for a rebalance to happen. The business would like to have a 3 seconds rebalance time. What should you do? (select two)

                                Answer: A,E

                                Explanation:
                                session.timeout.ms must be decreased to 3 seconds to allow for a faster rebalance, and the heartbeat thread must be quicker, so we also need to decrease heartbeat.interval.ms


                                NEW QUESTION # 71
                                You have a consumer group with default configuration settings reading messages from your Kafka cluster.
                                You want to optimize its throughput so the consumer group processes more messages in the same amount of time.
                                Which changes increase the consumption throughput?

                                Answer: B


                                NEW QUESTION # 72
                                ......

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