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Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

1. A Kafka producer application wants to send log messages to a topic that does not include any key. What are the properties that are mandatory to configure for the producer configuration? (select three)

A) key
B) partition
C) value
D) bootstrap.servers
E) key.serializer
F) value.serializer

2. Your producer is producing at a very high rate and the batches are completely full each time. How can you improve the producer throughput? (select two)

A) Increase linger.ms
B) Enable compression
C) Increase batch.size
D) Disable compression
E) Decrease batch.size
F) Decrease linger.ms

3. 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. request.size
D) batch .size

4. If I want to send binary data through the REST proxy, it needs to be base64 encoded. Which component needs to encode the binary data into base 64?

A) Zookeeper
B) The Kafka Broker
C) The REST Proxy
D) The Producer

5. Which of the following is a push query?

A) SELECT *
FROM NUMBER_OF_TESTS
WHERE ID='10';
B) SELECT windowstart, windowend, item_id, SUM(quantity)
FROM orders
WINDOW TUMBLING (SIZE 20 SECONDS)
GROUP BY item_id
EMIT CHANGES;
C) CREATE TABLE LEFT_TABLE (ID BIGINT PRIMARY KEY, NAME varchar, VALUE bigint) WITH (kafka_topic='left_topic', value_format='JSON', partitions=4);
D) CREATE STREAM STUDENTS (ID STRING KEY, SCORE INT)
WITH (kafka_topic='students_topic', value_format='JSON', partitions=4);

Solutions: