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Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

1. The producer code below features a Callback class with a method called onCompletion().
When will the onCompletion() method be invoked?

A) When a consumer sends an acknowledgement to the producer
B) When the producer receives the acknowledgment from the broker
C) When the producer batches the message
D) When the producer puts the message into its socket buffer

2. Match each configuration parameter with the correct option.
To answer choose a match for each option from the drop-down. Partial
credit is given for each correct answer.

3. (You create a topic with five partitions.
What can you assume about messages read from that topic by a single consumer group?)

A) The consumer group can only read the same number of messages from all the partitions.
B) All messages will be read from exactly one broker by the consumer group.
C) Messages from one partition can be consumed by any of the consumers in a group for faster processing.
D) Messages can be consumed by a maximum of five consumers in the same consumer group.

4. 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) Use a callback argument in producer.send() where you check delivery status.
D) Check that producer.send() returned a RecordMetadata object and is not null.

5. (You are configuring a source connector that writes records to an Orders topic.
You need to send some of the records to a different topic.
Which Single Message Transform (SMT) is best suited for this requirement?)

A) TombstoneHandler
B) RegexRouter
C) HeaderFrom
D) InsertField

Solutions: