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Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

1. You create a topic named loT-Data with 10 partitions and replication factor of three.
A producer sends 1 MB messages compressed with Gzip.
Which two statements are true in this scenario?
(Select two.)

A) All compressed messages will be stored in the same topic partition.
B) By default, compression is the producer's responsibility.
C) Compression type will be stored in batch attributes.
D) The message is already compressed so it will not be serialized.

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

3. (Your configuration parameters for a Source connector and Connect worker are:
* offset.flush.interval.ms=60000
* offset.flush.timeout.ms=500
* offset.storage.topic=connect-offsets
* offset.storage.replication.factor=-1
Which two statements match the expected behavior?
Select two.)

A) The connector will wait 500 ms before trying to commit offsets for tasks.
B) The offsets topic will use the broker default replication factor.
C) The connector will commit offsets to the broker default offsets topic.
D) The connector will commit offsets to a topic called connect-offsets.

4. (You want to enrich the content of a topic by joining it with key records from a second topic.
The two topics have a different number of partitions.
Which two solutions can you use?
Select two.)

A) Use a KStream-KTable join; Kafka Streams will automatically repartition the topics to satisfy the co- partitioning constraint.
B) Use a GlobalKTable for one of the topics where data does not change frequently and use a KStream- GlobalKTable join.
C) Create as many Kafka Streams application instances as the maximum number of partitions of the two topics and use a KStream-KTable join.
D) Repartition one topic to a new topic with the same number of partitions as the other topic (co- partitioning constraint) and use a KStream-KTable join.

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

Solutions: