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Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

1. What is the default maximum size of a message the Apache Kafka broker can accept?

A) 1MB
B) 10MB
C) 2MB
D) 5MB

2. Which configuration determines how many bytes of data are collected before sending messages to the Kafka broker?

A) send.buffer.bytes
B) buffer.memory
C) max.block.size
D) batch.size

3. You need to correctly join data from two Kafka topics.
Which two scenarios will allow for co-partitioning?
(Select two.)

A) Both topics have the same key and partitioning strategy.
B) Both topics have the same value schema.
C) Both topics have the same number of partitions.
D) Both topics have the same retention time.

4. (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) Log the bad record; no other action is needed.
D) Throw a runtime exception to trigger a restart of the application.

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

Solutions: