Free CCDAK Exam Dumps

Question 11

In Kafka, every broker... (select three)

A. contains all the topics and all the partitions
B. knows all the metadata for all topics and partitions
C. is a controller
D. knows the metadata for the topics and partitions it has on its disk
E. is a bootstrap broker
F. contains only a subset of the topics and the partitions

Correct Answer:BEF
Kafka topics are divided into partitions and spread across brokers. Each brokers knows about all the metadata and each broker is a bootstrap broker, but only one of them is elected controller

Question 12

What information isn't stored inside of Zookeeper? (select two)

A. Schema Registry schemas
B. Consumer offset
C. ACL inforomation
D. Controller registration
E. Broker registration info

Correct Answer:B
Consumer offsets are stored in a Kafka topic consumer_offsets, and the Schema Registry stored schemas in the _schemas topic.

Question 13

In Avro, removing a field that does not have a default is a schema evolution

A. breaking
B. full
C. backward
D. forward

Correct Answer:C
Clients with new schema will be able to read records saved with old schema.

Question 14

There are 3 producers writing to a topic with 5 partitions. There are 10 consumers consuming from the topic as part of the same group. How many consumers will remain idle?

A. 10
B. 3
C. None
D. 5

Correct Answer:D
One consumer per partition assignment will keep 5 consumers idle.

Question 15

Which KSQL queries write to Kafka?

A. COUNT and JOIN
B. SHOW STREAMS and EXPLAIN statements
C. CREATE STREAM WITH and CREATE TABLE WITH
D. CREATE STREAM AS SELECT and CREATE TABLE AS SELECT

Correct Answer:CD
SHOW STREAMS and EXPLAIN <query> statements run against the KSQL server that the KSQL client is connected to. They don't communicate directly with Kafka. CREATE STREAM WITH <topic> and CREATE TABLE WITH <topic> write metadata to the KSQL command topic. Persistent queries based on CREATE STREAM AS SELECT and CREATE TABLE AS SELECT read and write to Kafka topics. Non-persistent queries based on SELECT that are stateless only read from Kafka topics, for example SELECT ‚Ä¶ FROM foo WHERE ‚Ä¶. Non-persistent queries that are stateful read and write to Kafka, for example, COUNT and JOIN. The data in Kafka is deleted automatically when you terminate the query with CTRL-C.