Confluent CCDAK Exam : Confluent Certified Developer for Apache Kafka Certification Examination

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Confluent CCDAK Exam Syllabus Topics:

Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

1. Kafka producers can batch messages going to the same partition.
Which statement is correct about producer batching?

A) Producers can include multiple batches in a single request to a broker.
B) Producers can only batch messages of the same size.
C) Producers have a separate background thread for each batch.
D) Two or more broker failures will automatically disable batching on the producer.

2. You have a topic with four partitions. The application reads from it using two consumers in a single consumer group.
Processing is CPU-bound, and lag is increasing.
What should you do?

A) Decrease the max.poll.records property of consumers.
B) Add more partitions to the topic to increase the level of parallelism of the processing.
C) Add more consumers to increase the level of parallelism of the processing.
D) Increase the max.poll.records property of consumers.

3. Your application is consuming from a topic configured with a deserializer.
It needs to be resilient to badly formatted records ("poison pills"). You surround the poll() call with a try/catch for RecordDeserializationException.
You need to log the bad record, skip it, and continue processing.
Which action should you take in the catch block?

A) Log the bad record and seek the consumer to the offset of the next record.
B) Throw a runtime exception to trigger a restart of the application.
C) Log the bad record and call the consumer.skip() method.
D) Log the bad record, no other action needed.

4. You have a topic t1 with six partitions. You use Kafka Connect to send data from topic t1 in your Kafka cluster to Amazon S3. Kafka Connect is configured for two tasks.
How many partitions will each task process?

A) 6
B) 12
C) 3
D) 2

5. 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.)

A) The Connect cluster is in process of rebalancing.
B) The connect cluster has reached capacity, and new connectors cannot be created without expanding the cluster.
C) The connector configuration was invalid, and the response body will expand on the configuration error.
D) The Connector already exists in the cluster.

Solutions: