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Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

1. 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) Change the log level to DEBUG to have connector context information in logs.
D) Modify the log4j.properties file to add a dedicated log appender for the connector.

2. Which two statements about Kafka Connect Single Message Transforms (SMTs) are correct?
(Select two.)

A) Multiple SMTs can be chained together and act on source or sink messages.
B) SMT functionality is included within Kafka Connect converters.
C) SMTs are often used to join multiple records from a source data system into a single Kafka record.
D) Masking data is a good example of an SMT.

3. You need to configure a sink connector to write records that fail into a dead letter queue topic. Requirements:
Topic name: DLQ-Topic
Headers containing error context must be added to the messagesWhich three configuration parameters are necessary?(Select three.)

A) errors.tolerance=none
B) errors.log.enable=true
C) errors.deadletterqueue.context.headers.enable=true
D) errors.tolerance=all
E) errors.log.include.messages=true
F) errors.deadletterqueue.topic.name=DLQ-Topic

4. (You need to send a JSON message on the wire. The message key is a string.
How would you do this?)

A) Specify a value serializer class for the JSON contents of the message's value. Set a key serializer for the string value.
B) Specify a value serializer class for the JSON contents of the message's value. Set the key serializer class to JSON.
C) Specify a key serializer class for the JSON contents of the message's value. Set the value serializer class to null.
D) Specify a value serializer class for the JSON contents of the message's value. Set the key serializer class to null.

5. The producer code below features a Callback class with a method called onCompletion().
In the onCompletion() method, when the request is completed successfully, what does the value metadata.
offset() represent?

A) The ID of the partition to which the message was committed
B) Its position in the producer's batch of messages
C) The number of bytes that overflowed beyond a producer batch of messages
D) The sequential ID of the message committed into a partition

Solutions: