Free CCDAK Exam Dumps

Question 26

Your streams application is reading from an input topic that has 5 partitions. You run 5 instances of your application, each with num.streams.threads set to 5. How many stream tasks will be created and how many will be active?

A. 5 created, 1 active
B. 5 created, 5 active
C. 25 created, 25 active
D. 25 created, 5 active

Correct Answer:D
One partition is assigned a thread, so only 5 will be active, and 25 threads (i.e. tasks) will be created

Question 27

What isn't an internal Kafka Connect topic?

A. connect-status
B. connect-offsets
C. connect-configs
D. connect-jars

Correct Answer:D
connect-configs stores configurations, connect-status helps to elect leaders for connect, and connect-offsets store source offsets for source connectors

Question 28

If I produce to a topic that does not exist, and the broker setting auto.create.topic.enable=true, what will happen?

A. Kafka will automatically create the topic with 1 partition and 1 replication factor
B. Kafka will automatically create the topic with the indicated producer settings num.partitions and default.replication.factor
C. Kafka will automatically create the topic with the broker settings num.partitions and default.replication.factor
D. Kafka will automatically create the topic with num.partitions=#of brokers and replication.factor=3

Correct Answer:C
The broker settings comes into play when a topic is auto created

Question 29

Which is an optional field in an Avro record?

A. doc
B. name
C. namespace
D. fields

Correct Answer:A
doc represents optional description of message

Question 30

A producer just sent a message to the leader broker for a topic partition. The producer used acks=1 and therefore the data has not yet been replicated to followers. Under which conditions will the consumer see the message?

A. Right away
B. When the message has been fully replicated to all replicas
C. Never, the produce request will fail
D. When the high watermark has advanced

Correct Answer:D
The high watermark is an advanced Kafka concept, and is advanced once all the ISR replicates the latest offsets. A consumer can only read up to the value of the High Watermark (which can be less than the highest offset, in the case of acks=1)