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Confluent CCDAK Exam Syllabus Topics:

Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

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

2. You create a topic named loT-Data with 10 partitions and replication factor of three.
A producer sends 1 MB messages compressed with Gzip.
Which two statements are true in this scenario?
(Select two.)

A) Compression type will be stored in batch attributes.
B) All compressed messages will be stored in the same topic partition.
C) The message is already compressed so it will not be serialized.
D) By default, compression is the producer's responsibility.

3. Clients that connect to a Kafka cluster are required to specify one or more brokers in the bootstrap.servers parameter.
What is the primary advantage of specifying more than one broker?

A) It provides redundancy in making the initial connection to the Kafka cluster.
B) It forces clients to enumerate every single broker in the cluster.
C) It is the mechanism to distribute a topic's partitions across multiple brokers.
D) It provides the ability to wake up dormant brokers.

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

5. (You have a topic with four partitions. The application reading this topic is using a consumer group with two consumers.
Throughput is smoothly distributed among partitions, but application lag is increasing.
Application monitoring shows that message processing is consuming all available CPU resources.
Which action should you take to resolve this issue?)

A) Add more partitions to the topic to increase the level of parallelism of the processing.
B) Decrease the max.poll.records property of consumers.
C) Add more consumers to increase the level of parallelism of the processing.
D) Increase the max.poll.records property of consumers.

Solutions: