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Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

1. A producer is configured with the default partitioner. It is sending records to a topic that is configured with five partitions. The record does not contain any key.
What is the result of this?

A) An error will be raised and no record will be sent.
B) Records will be sent to the least used partition.
C) Records will be sent to partition 0.
D) Records will be dispatched among the available partitions.

2. An application is consuming messages from Kafka.
The application logs show that partitions are frequently being reassigned within the consumer group.
Which two factors may be contributing to this?
(Select two.)

A) An instance of the application is crashing and being restarted.
B) There is a storage issue on the broker.
C) There is a slow consumer processing application.
D) The number of partitions does not match the number of application instances.

3. Which two producer exceptions are examples of the class RetriableException? (Select two.)

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

4. (A stream processing application tracks user activity in online shopping carts, including items added, removed, and ordered throughout the day for each user.
You need to capture data to identify possible periods of user inactivity.
Which type of Kafka Streams window should you use?)

A) Sliding
B) Tumbling
C) Hopping
D) Session

5. (A consumer application runs once every two weeks and reads from a Kafka topic.
The last time the application ran, the last offset processed was 217.
The application is configured with auto.offset.reset=latest.
The current offsets in the topic start at 318 and end at 588.
Which offset will the application start reading from when it starts up for its next run?)

A) 589
B) 0
C) 218
D) 318

Solutions: