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Confluent CCDAK Exam Syllabus Topics:

Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

1. Which statement is true about how exactly-once semantics (EOS) work in Kafka Streams?

A) Kafka Streams provides EOS by periodically checkpointing state stores and replaying changelogs to recover only unprocessed messages during failure.
B) Kafka Streams disables log compaction on internal changelog topics to preserve all state changes for potential recovery.
C) EOS in Kafka Streams is implemented by creating a separate Kafka topic for deduplication of all messages processed by the application.
D) EOS in Kafka Streams relies on transactional producers to atomically commit state updates to changelog topics and output records to Kafka.

2. What is accomplished by producing data to a topic with a message key?

A) Messages with the same key are routed to a deterministically selected partition, enabling order guarantees within that partition.
B) Kafka brokers allow you to add more partitions to a given topic, without impacting the data flow for existing keys.
C) It provides a mechanism for encrypting messages at the partition level to ensure secure data transmission.
D) Consumers can filter messages in real time based on the message key without processing unrelated messages.

3. You use Kafka Connect with the JDBC source connector to extract data from a large database and push it into Kafka.
The database contains tens of tables, and the current connector is unable to process the data fast enough.
You add more Kafka Connect workers, but throughput doesn't improve.
What should you do next?

A) Add more Kafka brokers to the cluster.
B) Modify the database schemas to enable horizontal sharding.
C) Increase the value of the connector's property tasks.max.
D) Increase the number of Kafka partitions for the topics.

4. You are working on a Kafka cluster with three nodes. You create a topic named orders with:
replication.factor = 3
min.insync.replicas = 2
acks = allWhat exception will be generated if two brokers are down due to network delay?

A) NotEnoughReplicasException
B) NotLeaderForPartitionException
C) NotCoordinatorException
D) NetworkException

5. What are two examples of performance metrics?
(Select two.)

A) total-login-attempts
B) Number of active user sessions
C) incoming-byte-rate
D) Time of last failed login
E) Number of active users
F) fetch-rate

Solutions: