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Confluent CCDAK Exam Syllabus Topics:

Section	Objectives
Kafka Fundamentals	- Data flow in Kafka 1. Offset management 2. Producer and consumer model - Kafka architecture and core concepts 1. Brokers, topics, partitions 2. Replication and fault tolerance
Kafka Ecosystem and Confluent Platform	- ksqlDB and connectors 1. Stream querying concepts 2. Kafka Connect basics - Schema Registry 1. Avro, Protobuf, JSON Schema usage
Kafka Producers and Consumers	- Producer API 1. Serialization and partitioning strategies 2. Reliability and acknowledgments - Consumer API 1. Consumer groups 2. Rebalancing and offset commits
Kafka Streams and Processing	- Kafka Streams API 1. Stateful vs stateless processing 2. Stream processing fundamentals - Event processing patterns 1. Exactly-once semantics 2. Windowing and aggregation

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Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions (Q26-Q31):

NEW QUESTION # 26
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. Consumer reads message from a topic
C. Client requests metadata for a topic
D. Client alters number of partitions of a topic

Answer: A,B,C

Explanation:
A kafka broker automatically creates a topic under the following circumstances- When a producer starts writing messages to the topic - When a consumer starts reading messages from the topic - When any client requests metadata for the topic

NEW QUESTION # 27
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=LastCommittedRecordOffset
B. kafka.controller:type=KafkaController,name=TopicsToDeleteCount
C. kafka.controller:type=ControllerStats,name=UncleanLeaderElectionsPerSec
D. kafka.controller:type=KafkaController,name=ActiveControllerCount
E. kafka.controller:type=KafkaController,name=OfflinePartitionsCount

Answer: C,D,E

Explanation:
These three metrics are critical for cluster health:
OfflinePartitionsCount: Indicates partitions without active leaders - a sign of broker failure.
ActiveControllerCount: There should be exactly one active controller. A count # 1 signals controller failure.
UncleanLeaderElectionsPerSec: Tracks leader elections where out-of-sync replicas were selected - risky for data loss.
From Kafka Monitoring Documentation:
"Offline partitions and unclean leader elections should trigger alerts. Also, ensure a single active controller is running." A is about topics pending deletion - not critical.
E is a per-topic record metric, not broker-level.
Reference: Kafka Monitoring > Key JMX Metrics

NEW QUESTION # 28
A consumer wants to read messages from a specific partition of a topic. How can this be achieved?

A. Call subscribe() passing TopicPartition as the argument
B. Call assign() passing a Collection of TopicPartitions as the argument
C. Call subscribe(String topic, int partition) passing the topic and partition number as the arguments

Answer: B

Explanation:
assign() can be used for manual assignment of a partition to a consumer, in which case subscribe() must not be used. Assign() takes a collection of TopicPartition object as an argument https://kafka.apache.org/23
/javadoc/org/apache/kafka/clients/consumer/KafkaConsumer.html#assign-java.util.Collection-

NEW QUESTION # 29
Which topic stores the sink connector offsets?

A. Topic name from status.storage.topic
B. _consumer_offset
C. Topic name from config.storage.topic
D. Topic name from offset.storage.topic

Answer: D

NEW QUESTION # 30
What isn't an internal Kafka Connect topic?

A. connect-status
B. connect-jars
C. connect-offsets
D. connect-configs

Answer: B

Explanation:
connect-configs stores configurations, connect-status helps to elect leaders for connect, and connect-offsets store source offsets for source connectors

NEW QUESTION # 31
......

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