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Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

1. Which two statements are correct about transactions in Kafka?
(Select two.)

A) Transactions are only possible when writing messages to a topic with single partition.
B) Transactions guarantee at least once delivery of messages.
C) All messages from a failed transaction will be deleted from a Kafka topic.
D) Consumers can consume both committed and uncommitted transactions.
E) Information about producers and their transactions is stored in the _transaction_state topic.

2. How will you set the retention for the topic named 'Aumy-topic' to 1 hour?

A) Set the topic config retention.ms to 3600000
B) Set the producer config retention.ms to 3600000
C) Set the consumer config retention.ms to 3600000
D) Set the broker config log.retention.ms to 3600000

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

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

4. We would like to be in an at-most once consuming scenario. Which offset commit strategy would you recommend?

A) Do not commit any offsets and read from beginning
B) Commit the offsets in Kafka, after processing the data
C) Commit the offsets on disk, after processing the data
D) Commit the offsets in Kafka, before processing the data

5. What are the requirements for a Kafka broker to connect to a Zookeeper ensemble? (select two)

A) All the brokers must share the same broker.id
B) Unique values for each broker's broker.id parameter
C) Unique value for each broker's zookeeper.connect parameter
D) All the brokers must share the same zookeeper.connect parameter

Solutions: