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Confluent CCDAK Exam Syllabus Topics:

Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

1. You are working on a Kafka cluster with three nodes. You create a topic named orders with:
replication.factor = 3
min.insync.replicas = 2
acks = allWhat exception will be generated if two brokers are down due to network delay?

A) NotEnoughReplicasException
B) NetworkException
C) NotLeaderForPartitionException
D) NotCoordinatorException

2. You are developing a Java application using a Kafka consumer.
You need to integrate Kafka's client logs with your own application's logs using log4j2.
Which Java library dependency must you include in your project?

A) Just the log4j2 dependency of the application
B) None, the right dependency will be added by the Kafka client dependency by transitivity.
C) SLF4J implementation for Log4j2 (org.apache.logging.log4j:log4j-slf4j-impl)
D) SLF4J implementation for Log4j 1.2 (org.slf4j:slf4j-log4j12)

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

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

4. 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 add a dedicated log appender for the connector.
B) Make no change, there is no way to find logs other than by stopping all the other connectors.
C) Change the log level to DEBUG to have connector context information in logs.
D) Modify the log4j.properties file to enable connector context.

5. (You are writing to a Kafka topic with producer configuration acks=all.
The producer receives acknowledgements from the broker but still creates duplicate messages due to network timeouts and retries.
You need to ensure that duplicate messages are not created.
Which producer configuration should you set?)

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

Solutions: