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Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

1. Which of the following Kafka Streams operators are stateful? (select all that apply)

A) count
B) aggregate
C) flatmap
D) peek
E) reduce
F) joining

2. Which is an optional field in an Avro record?

A) name
B) fields
C) namespace
D) doc

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

4. Refer to the producer code below. It features a 'Callback' class with a method called 'onCompletion()'.
In the 'on Completion*.)' method, what does the 'metadata.offset()' value represent?

producer.send(record, new MyCallback(record));

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

5. A consumer starts and has auto.offset.reset=none, and the topic partition currently has data for offsets going from 45 to 2311. The consumer group has committed the offset 10 for the topic before. Where will the consumer read from?

A) offset 2311
B) offset 45
C) it will crash
D) offset 10

Solutions: