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Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

1. (You are writing a producer application and need to ensure proper delivery.
You configure the producer with acks=all.
Which two actions should you take to ensure proper error handling?
Select two.)

A) Surround the call to producer.send() with a try/catch block to catch KafkaException.
B) Use a callback argument in producer.send() where you check delivery status.
C) Check the value of ProducerRecord.status().
D) Check that producer.send() returned a RecordMetadata object and is not null.

2. Your company has three Kafka clusters: Development, Testing, and Production.
The Production cluster is running out of storage, so you add a new node.
Which two statements about the new node are true?
(Select two.)

A) A new node will not have any partitions assigned to it unless a new topic is created or reassignment occurs.
B) A newly added node will have KRaft controller role by default.
C) A new node can be added without stopping existing cluster nodes.
D) A node ID will be assigned to the new node automatically.

3. You need to set alerts on key broker metrics to trigger notifications when the cluster is unhealthy.
Which are three minimum broker metrics to monitor?
(Select three.)

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

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

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

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