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Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

1. You need to configure a sink connector to write records that fail into a dead letter queue topic. Requirements:
Topic name: DLQ-Topic
Headers containing error context must be added to the messagesWhich three configuration parameters are necessary?(Select three.)

A) errors.log.include.messages=true
B) errors.tolerance=none
C) errors.tolerance=all
D) errors.deadletterqueue.context.headers.enable=true
E) errors.deadletterqueue.topic.name=DLQ-Topic
F) errors.log.enable=true

2. Which configuration determines how many bytes of data are collected before sending messages to the Kafka broker?

A) buffer.memory
B) send.buffer.bytes
C) max.block.size
D) batch.size

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

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

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

5. You create a topic named loT-Data with 10 partitions and replication factor of three.
A producer sends 1 MB messages compressed with Gzip.
Which two statements are true in this scenario?
(Select two.)

A) Compression type will be stored in batch attributes.
B) The message is already compressed so it will not be serialized.
C) All compressed messages will be stored in the same topic partition.
D) By default, compression is the producer's responsibility.

Solutions: