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Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

1. Your producer is producing at a very high rate and the batches are completely full each time. How can you improve the producer throughput? (select two)

A) Enable compression
B) Increase linger.ms
C) Decrease batch.size
D) Disable compression
E) Decrease linger.ms
F) Increase batch.size

2. You are experiencing low throughput from a Java producer. You monitor the Kafka metrics and notice that the metrics for that producer show low I/O thread ratio and low I/O thread wait ratio.
What is most likely the cause of the slow producer performance?

A) Compression is enabled.
B) The producer code has an expensive callback function.
C) There is a bad data link layer (layer 2) connection from the producer to the cluster.
D) The producer is sending large batches of messages.

3. The rule "same key goes to the same partition" is true unless...

A) the number of kafka broker changes
B) the replication factor changes
C) the number of producer changes
D) the number of partition changes

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

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

5. In Kafka, every broker... (select three)

A) knows the metadata for the topics and partitions it has on its disk
B) is a bootstrap broker
C) knows all the metadata for all topics and partitions
D) contains only a subset of the topics and the partitions
E) is a controller
F) contains all the topics and all the partitions

Solutions: