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Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

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

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

2. In Java, Avro SpecificRecords classes are

A) automatically generated from an Avro Schema
B) automatically generated from an Avro Schema + a Maven / Gradle Plugin
C) written manually by the programmer

3. Which of the following setting increases the chance of batching for a Kafka Producer?

A) Increase batch.size
B) Increase the number of producer threads
C) Increase message.max.bytes
D) Increase linger.ms

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

5. A topic has three replicas and you set min.insync.replicas to 2. If two out of three replicas are not available, what happens when a produce request with acks=all is sent to broker?

A) Produce request will block till one of the two unavailable partition is available again.
B) Produce request is honored with single in-sync replica
C) NotEnoughReplicasException will be returned

Solutions: