Free Confluent CCDAK Exam Dumps Questions & Answers

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

What is a consequence of increasing the number of partitions in an existing Kafka topic?

• A.Existing data will be redistributed across the new number of partitions temporarily increasing cluster load.
• B.Records with the same key could be located in different partitions.
• C.Consumers will need to process data from more partitions which will significantly increase consumer lag.
• D.The acknowledgment process will increase latency for producers using acks=all.

(You have a Kafka consumer in production actively reading from a critical topic from which multiple other applications are consuming.
You have a new requirement to update the offset of your consumer to start reading from the beginning of the topic.
Which action would you take?)

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

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

Match the topic configuration setting with the reason the setting affects topic durability.
(You are given settings like unclean.leader.election.enable=false, replication.factor, min.insync.replicas=2)

Correct Answer:

Explanation:
unclean.leader.election.enable=false # Prevents data loss by only considering in-sync replicas when rebalancing.
replication.factor # Specifies how many redundant copies of partitions are distributed across brokers.
min.insync.replicas=2 # Sets the standard for the number of partition instances that must keep up with the latest committed message.
unclean.leader.election.enable=false ensures that only in-sync replicas can be elected as leaders. If disabled, an out-of-sync replica may become leader, potentially leading to data loss.
replication.factor defines how many brokers will maintain copies of each partition, directly impacting durability and availability.
min.insync.replicas determines how many replicas must acknowledge a write when acks=all is used, enforcing write durability.
Reference: Apache Kafka Topic Configuration Documentation