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Confluent CCDAK Exam Syllabus Topics:

Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

1. You are writing to a topic with acks=all.
The producer receives acknowledgments but you notice duplicate messages.
You find that timeouts due to network delay are causing resends.
Which configuration should you use to prevent duplicates?

A) retries=2147483647max.in.flight.requests.per.connection=1enable.idempotence=false
B) retries=0max.in.flight.requests.per.connection=5enable.idempotence=true
C) enable.auto.commit=true
D) retries=2147483647max.in.flight.requests.per.connection=5enable.idempotence=true

2. You need to set alerts on key broker metrics to trigger notifications when the cluster is unhealthy.
Which are three minimum broker metrics to monitor?
(Select three.)

A) kafka.controller:type=KafkaController,name=LastCommittedRecordOffset
B) kafka.controller:type=KafkaController,name=ActiveControllerCount
C) kafka.controller:type=ControllerStats,name=UncleanLeaderElectionsPerSec
D) kafka.controller:type=KafkaController,name=TopicsToDeleteCount
E) kafka.controller:type=KafkaController,name=OfflinePartitionsCount

3. (You are writing a producer application and need to ensure proper delivery.
You configure the producer with acks=all.
Which two actions should you take to ensure proper error handling?
Select two.)

A) Use a callback argument in producer.send() where you check delivery status.
B) Check that producer.send() returned a RecordMetadata object and is not null.
C) Surround the call to producer.send() with a try/catch block to catch KafkaException.
D) Check the value of ProducerRecord.status().

4. (You are writing to a Kafka topic with producer configuration acks=all.
The producer receives acknowledgements from the broker but still creates duplicate messages due to network timeouts and retries.
You need to ensure that duplicate messages are not created.
Which producer configuration should you set?)

A) retries=0max.in.flight.requests.per.connection=5enable.idempotence=true
B) retries=2147483647max.in.flight.requests.per.connection=5enable.idempotence=false
C) enable.auto.commit=true
D) retries=2147483647max.in.flight.requests.per.connection=1enable.idempotence=true

5. You need to explain the best reason to implement the consumer callback interface ConsumerRebalanceListener prior to a Consumer Group Rebalance.
Which statement is correct?

A) Offsets are compacted.
B) Previous log files are deleted.
C) Partition leaders may change.
D) Partitions assigned to a consumer may change.

Solutions: