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Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

1. (You need to set alerts on key broker metrics to trigger notifications when a Kafka cluster is unhealthy.
What are three minimum broker metrics to monitor for cluster health?
Select three.)

A) kafka.controller:type=KafkaController,name=LastCommittedRecordOffset
B) kafka.controller:type=KafkaController,name=OfflinePartitionsCount
C) kafka.controller:type=KafkaController,name=TopicsToDeleteCount
D) kafka.controller:type=ControllerStats,name=UncleanLeaderElectionsPerSec
E) kafka.controller:type=KafkaController,name=ActiveControllerCount

2. Match each configuration parameter with the correct deployment step in installing a Kafka connector.

3. (A consumer application needs to use an at-most-once delivery semantic.
What is the best consumer configuration and code skeleton to avoid duplicate messages being read?)

A) auto.offset.reset=earliest and enable.auto.commit=falsewhile (true) {final var records = consumer.poll (POLL_TIMEOUT);consumer.commitAsync();for (var record : records) {// Any processing}}
B) auto.offset.reset=latest and enable.auto.commit=truewhile (true) {final var records = consumer.poll (POLL_TIMEOUT);for (var record : records) {// Any processing}consumer.commitAsync();}
C) auto.offset.reset=earliest and enable.auto.commit=truewhile (true) {final var records = consumer.poll (POLL_TIMEOUT);consumer.commitAsync();for (var record : records) {// Any processing}}
D) auto.offset.reset=earliest and enable.auto.commit=falsewhile (true) {final var records = consumer.poll (POLL_TIMEOUT);for (var record : records) {// Any processing}consumer.commitAsync();}

4. Which two statements are correct when assigning partitions to the consumers in a consumer group using the assign() API?
(Select two.)

A) It is mandatory to subscribe to a topic before calling assign() to assign partitions.
B) The consumer group will not be rebalanced if a consumer leaves the group.
C) The consumer chooses which partition to read without any assignment from brokers.
D) All topics must have the same number of partitions to use assign() API.

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

Solutions: