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Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

1. To prevent network-induced duplicates when producing to Kafka, I should use

A) retries=200000
B) batch.size=1
C) enable.idempotence=true
D) max.in.flight.requests.per.connection=1

2. In Avro, adding a field to a record without default is a __ schema evolution

A) breaking
B) backward
C) forward
D) full

3. Where are the dynamic configurations for a topic stored?

A) In server.properties
B) In an internal Kafka topic __topic_configuratins
C) On the Kafka broker file system
D) In Zookeeper

4. You have a Kafka consumer in production actively reading from a critical topic.
You need to update the offset of your consumer to start reading from the beginning of the topic.
Which action should you take?

A) Temporarily configure the topic's retention.ms parameter to 0 to empty the topic.
B) Update the consumer group's offset to the earliest position using the kafka-consumer-groups CLI tool.
C) Update the consumer configuration by setting auto.offset.reset=earliest.
D) Start a new consumer application with the same consumer group id.

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

Solutions: