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Confluent CCDAK Exam Syllabus Topics:

Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

1. You create a topic named stream-logs with:
A replication factor of 3
Four partitions
Messages that are plain logs without a keyHow will messages be distributed across partitions?

A) The first message will always be written to partition 0.
B) All messages will be written to the same log segment.
C) Messages will be distributed round-robin among all the topic partitions.
D) Messages will be distributed among all the topic partitions with strict ordering.

2. What is accomplished by producing data to a topic with a message key?

A) Messages with the same key are routed to a deterministically selected partition, enabling order guarantees within that partition.
B) Consumers can filter messages in real time based on the message key without processing unrelated messages.
C) It provides a mechanism for encrypting messages at the partition level to ensure secure data transmission.
D) Kafka brokers allow you to add more partitions to a given topic, without impacting the data flow for existing keys.

3. You are writing a producer application and need to ensure proper delivery. You configure the producer with acks=all.
Which two actions should you take to ensure proper error handling?
(Select two.)

A) Surround the call of producer.send() with a try/catch block to catch KafkaException.
B) Check the value of ProducerRecord.status().
C) Check that producer.send() returned a RecordMetadata object and is not null.
D) Use a callback argument in producer.send() where you check delivery status.

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

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

Solutions: