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Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

1. Which two statements about Kafka Connect Single Message Transforms (SMTs) are correct?
(Select two.)

A) Multiple SMTs can be chained together and act on source or sink messages.
B) SMT functionality is included within Kafka Connect converters.
C) SMTs are often used to join multiple records from a source data system into a single Kafka record.
D) Masking data is a good example of an SMT.

2. What's a Kafka partition made of?

A) One file
B) One file and one index
C) One file and two indexes per segment
D) One file and two indexes

3. An ecommerce website maintains two topics - a high volume "purchase" topic with 5 partitions and low volume "customer" topic with 3 partitions. You would like to do a stream-table join of these topics. How should you proceed?

A) Repartition the purchase topic to have 3 partitions
B) Model customer as a GlobalKTable
C) Repartition customer topic to have 5 partitions
D) Do a KStream / KTable join after a repartition step

4. while (true) {
ConsumerRecords<String, String> records = consumer.poll(100);
try {
consumer.commitSync();
} catch (CommitFailedException e) {
log.error("commit failed", e)
}
for (ConsumerRecord<String, String> record records)
{
System.out.printf("topic = %s, partition = %s, offset =
%d, customer = %s, country = %s
",
record.topic(), record.partition(),
record.offset(), record.key(), record.value());
}
}
What kind of delivery guarantee this consumer offers?

A) At-most-once
B) Exactly-once
C) At-least-once

5. If I want to send binary data through the REST proxy to topic "test_binary", it needs to be base64 encoded. A consumer connecting directly into the Kafka topic

A) binary data
B) avro data
C) base64 encoded data, it will need to decode it
D) json data
E) "test_binary" will receive

Solutions: