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Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

1. A consumer wants to read messages from partitions 0 and 1 of a topic topic1. Code snippet is shown below.
consumer.subscribe(Arrays.asList("topic1"));
List<TopicPartition> pc = new ArrayList<>();
pc.add(new PartitionTopic("topic1", 0));
pc.add(new PartitionTopic("topic1", 1));
consumer.assign(pc);

A) Throws IllegalStateException
B) This works fine. subscribe() will subscribe to the topic and assign() will assign partitions to the consumer.

2. How do you create a topic named test with 3 partitions and 3 replicas using the Kafka CLI?

A) bin/kafka-topics.sh --create --bootstrap-server localhost:2181 --replication-factor 3 --partitions 3 --topic test
B) bin/kafka-topics.sh --create --bootstrap-server localhost:9092 --replication-factor 3 --partitions 3 --topic test
C) bin/kafka-topics-create.sh --zookeeper localhost:9092 --replication-factor 3 --partitions 3 --topic test
D) bin/kafka-topics.sh --create --broker-list localhost:9092 --replication-factor 3 --partitions 3 --topic test

3. When auto.create.topics.enable is set to true in Kafka configuration, what are the circumstances under which a Kafka broker automatically creates a topic? (select three)

A) Producer sends message to a topic
B) Client requests metadata for a topic
C) Client alters number of partitions of a topic
D) Consumer reads message from a topic

4. What is ISR in Apache Kafka?

A) "in-sync" resource
B) "in-sync" replicas
C) "in-sync" retention
D) "in-sync" remote access

5. A consumer starts and has auto.offset.reset=latest, and the topic partition currently has data for offsets going from 45 to 2311. The consumer group has committed the offset 643 for the topic before. Where will the consumer read from?

A) offset 45
B) it will crash
C) offset 643
D) offset 2311

Solutions: