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The CCDAK Certification Exam covers a range of topics related to Kafka-based solutions, including Kafka architecture, basic and advanced Kafka APIs, Kafka Streams, Kafka Connect, and Kafka security. CCDAK exam is designed to test the ability of the developer to design and implement a Kafka-based solution that meets the requirements of a given use case, as well as troubleshoot and optimize Kafka-based solutions.

Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions (Q70-Q75):

NEW QUESTION # 70
What is a consequence of increasing the number of partitions in an existing Kafka topic?

A. The acknowledgment process will increase latency for producers using acks=all.
B. Existing data will be redistributed across the new number of partitions temporarily increasing cluster load.
C. Records with the same key could be located in different partitions.
D. Consumers will need to process data from more partitions which will significantly increase consumer lag.

Answer: D

Explanation:
Increasing partitions increases parallelism, but also means:
Consumers in a group may have to handle more partitions, especially if the number of consumers is lower than the number of partitions.
This can result in increased lag, especially under high load.
From Kafka Topic Management Docs:
"Increasing the number of partitions increases consumer work, and if consumers can't keep up, lag can accumulate." A is false: existing data is not redistributed.
B is false: records with the same key always map to the same partition based on hash.
D is not directly impacted by the partition count.
Reference: Kafka Topic Management > Adding Partitions

NEW QUESTION # 71
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. Change the log level to DEBUG to have connector context information in logs.
C. Make no change, there is no way to find logs other than by stopping all the other connectors.
D. Modify the log4j.properties file to enable connector context.

Answer: A

Explanation:
To isolate logs for a specific connector, you can configurea separate logger and appenderin theConnect worker's log4j.propertiesfile, using the connector's name as the logging context.
FromKafka Connect Logging Docs:
"Kafka Connect loggers use hierarchical logger names. You can configure per-connector log levels and output files by extending log4j.properties."
* A and C change verbosity but don't separate logs.
* D is false; targeted logging is possible.
Reference:Kafka Connect > Logging and Debugging

NEW QUESTION # 72
What is a generic unique id that I can use for messages I receive from a consumer?

A. topic + partition + timestamp
B. topic + partition + offset
C. topic + timestamp

Answer: B

Explanation:
(Topic,Partition,Offset) uniquely identifies a message in Kafka

NEW QUESTION # 73
An application is writing AVRO messages using Schema Registry to topic t1. During this process, the Schema Registry becomes unavailable for a few seconds.
What is the expected impact to the application?

A. Since messages are cached by the producer, the application will only get an error if the producer is sending the batch at that time.
B. All messages within that time will receive an error.
C. Since the broker will eventually replicate the message Schema, there will not be an error.
D. The application may not have any impact, unless it is writing messages with a new Schema Definition.

Answer: D

NEW QUESTION # 74
Which producer exceptions are examples of the class RetriableException? (Choose 2.)

A. LeaderNotAvailableException
B. AuthorizationException
C. RecordTooLargeException
D. NotEnoughReplicasException

Answer: A,D

NEW QUESTION # 75
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