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Confluent CCDAK Exam Syllabus Topics:

Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

1. Which two statements are correct about transactions in Kafka?
(Select two.)

A) Transactions guarantee at least once delivery of messages.
B) Transactions are only possible when writing messages to a topic with single partition.
C) Information about producers and their transactions is stored in the _transaction_state topic.
D) All messages from a failed transaction will be deleted from a Kafka topic.
E) Consumers can consume both committed and uncommitted transactions.

2. Your application is consuming from a topic with one consumer group.
The number of running consumers is equal to the number of partitions.
Application logs show that some consumers are leaving the consumer group during peak time, triggering a rebalance. You also notice that your application is processing many duplicates.
You need to stop consumers from leaving the consumer group.
What should you do?

A) Add more consumer instances.
B) Increase session.timeout.ms property.
C) Split consumers in different consumer groups.
D) Reduce max.poll.records property.

3. You use Kafka Connect with the JDBC source connector to extract data from a large database and push it into Kafka.
The database contains tens of tables, and the current connector is unable to process the data fast enough.
You add more Kafka Connect workers, but throughput doesn't improve.
What should you do next?

A) Modify the database schemas to enable horizontal sharding.
B) Increase the number of Kafka partitions for the topics.
C) Increase the value of the connector's property tasks.max.
D) Add more Kafka brokers to the cluster.

4. (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=LastCommittedRecordOffset
B) kafka.controller:type=KafkaController,name=TopicsToDeleteCount
C) kafka.controller:type=KafkaController,name=OfflinePartitionsCount
D) kafka.controller:type=KafkaController,name=ActiveControllerCount
E) kafka.controller:type=ControllerStats,name=UncleanLeaderElectionsPerSec

5. What is the default maximum size of a message the Apache Kafka broker can accept?

A) 2MB
B) 5MB
C) 10MB
D) 1MB

Solutions: