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Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

1. You are creating a Kafka Streams application to process retail data.
Match the input data streams with the appropriate Kafka Streams object.

2. (You are developing a Kafka Streams application with a complex topology that has multiple sources, processors, sinks, and sub-topologies.
You are working in a development environment and do not have access to a real Kafka cluster or topics.
You need to perform unit testing on your Kafka Streams application.
Which should you use?)

A) TopologyTestDriver
B) TestProducer, TestConsumer
C) MockProducer, MockConsumer
D) KafkaUnitTestDriver

3. You want to connect with username and password to a secured Kafka cluster that has SSL encryption.
Which properties must your client include?

A) security.protocol=PLAINTEXTsasl.jaas.config=org.apache.kafka.common.security.ssl.
TlsLoginModule required username='myUser' password='myPassword';
B) security.protocol=SASL_PLAINTEXTsasl.jaas.config=org.apache.kafka.common.security.plain.
PlainLoginModule required username='myUser' password='myPassword';
C) security.protocol=SASL_SSLsasl.jaas.config=org.apache.kafka.common.security.plain.
PlainLoginModule required username='myUser' password='myPassword';
D) security.protocol=SSLsasl.jaas.config=org.apache.kafka.common.security.plain.PlainLoginModule required username='myUser' password='myPassword';

4. (You are designing a stream pipeline to monitor the real-time location of GPS trackers, where historical location data is not required.
Each event has:
* Key: trackerId
* Value: latitude, longitude
You need to ensure that the latest location for each tracker is always retained in the Kafka topic.
Which topic configuration parameter should you set?)

A) cleanup.policy=compact
B) retention.ms=0
C) min.cleanable.dirty.ratio=-1
D) retention.ms=infinite

5. (You need to send a JSON message on the wire. The message key is a string.
How would you do this?)

A) Specify a value serializer class for the JSON contents of the message's value. Set the key serializer class to JSON.
B) Specify a value serializer class for the JSON contents of the message's value. Set the key serializer class to null.
C) Specify a key serializer class for the JSON contents of the message's value. Set the value serializer class to null.
D) Specify a value serializer class for the JSON contents of the message's value. Set a key serializer for the string value.

Solutions: