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Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

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

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

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

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

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

4. You are working on a Kafka cluster with three nodes. You create a topic named orders with:
replication.factor = 3
min.insync.replicas = 2
acks = allWhat exception will be generated if two brokers are down due to network delay?

A) NetworkException
B) NotEnoughReplicasException
C) NotCoordinatorException
D) NotLeaderForPartitionException

5. (Your application consumes from a topic configured with a deserializer.
You want the application to be resilient to badly formatted records (poison pills).
You surround the poll() call with a try/catch block for RecordDeserializationException.
You need to log the bad record, skip it, and continue processing other records.
Which action should you take in the catch block?)

A) Log the bad record and call consumer.skip() method.
B) Log the bad record and seek the consumer to the offset of the next record.
C) Throw a runtime exception to trigger a restart of the application.
D) Log the bad record; no other action is needed.

Solutions: