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Confluent CCDAK Exam Syllabus Topics:

Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

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

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

2. Your Kafka cluster has five brokers. The topic t1 on the cluster has:
Two partitions
Replication factor = 4
min.insync.replicas = 3You need strong durability guarantees for messages written to topic t1.You configure a producer acks=all and all the replicas for t1 are in-sync.How many brokers need to acknowledge a message before it is considered committed?

A) 3
B) 5
C) 2
D) 4

3. Which is true about topic compaction?

A) When a client produces a new event with an existing key, the old value is overwritten with the new value in the compacted log segment.
B) When a client produces a new event with an existing key, the broker immediately deletes the offset of the existing event.
C) Topic compaction does not remove old events; instead, when clients consume events from a compacted topic, they store events in a hashmap that maintains the latest value.
D) Compaction will keep exactly one message per key after compaction of inactive log segments.

4. You have a Kafka client application that has real-time processing requirements.
Which Kafka metric should you monitor?

A) Total time to serve requests to replica followers
B) Aggregate incoming byte rate
C) Consumer lag between brokers and consumers
D) Consumer heartbeat rate to group coordinator

5. 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) Start a new consumer application with the same consumer group id.
D) Update the consumer configuration by setting auto.offset.reset=earliest.

Solutions: