Confluent CCDAK : Confluent Certified Developer for Apache Kafka Certification Examination

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Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

1. A stream processing application is tracking user activity in online shopping carts.
You want to identify periods of user inactivity.
Which type of Kafka Streams window should you use?

A) Sliding
B) Tumbling
C) Session
D) Hopping

2. 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) Modify the log4j.properties file to enable connector context.
B) Make no change, there is no way to find logs other than by stopping all the other connectors.
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.

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

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

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

5. You are writing to a topic with acks=all.
The producer receives acknowledgments but you notice duplicate messages.
You find that timeouts due to network delay are causing resends.
Which configuration should you use to prevent duplicates?

A) retries=0max.in.flight.requests.per.connection=5enable.idempotence=true
B) enable.auto.commit=true
C) retries=2147483647max.in.flight.requests.per.connection=1enable.idempotence=false
D) retries=2147483647max.in.flight.requests.per.connection=5enable.idempotence=true

Solutions: