Free CCDAK Exam Braindumps

How much should be the heap size of a broker in a production setup on a machine with 256 GB of RAM, in PLAINTEXT mode?

1. A. 4 GB
2. B. 128 GB
3. C. 16 GB
4. D. 512 MB

Correct Answer: A
In Kafka, a small heap size is needed, while the rest of the RAM goes automatically to the page cache (managed by the OS). The heap size goes slightly up if you need to enable SSL

Which of the following Kafka Streams operators are stateful? (select all that apply)

1. A. flatmap
2. B. reduce
3. C. joining
4. D. count
5. E. peek
6. F. aggregate

Correct Answer: BCDF
Seehttps://kafka.apache.org/20/documentation/streams/developer-guide/dsl- api.html#stateful-transformations

How do Kafka brokers ensure great performance between the producers and consumers? (select two)

1. A. It compresses the messages as it writes to the disk
2. B. It leverages zero-copy optimisations to send data straight from the page-cache
3. C. It buffers the messages on disk, and sends messages from the disk reads
4. D. It transforms the messages into a binary format
5. E. It does not transform the messages

Correct Answer: BE
Kafka transfers data with zero-copy and sends the raw bytes it receives from the producer
straight to the consumer, leveraging the RAM available as page cache

Select all that applies (select THREE)

1. A. min.insync.replicas is a producer setting
2. B. acks is a topic setting
3. C. acks is a producer setting
4. D. min.insync.replicas is a topic setting
5. E. min.insync.replicas matters regardless of the values of acks
6. F. min.insync.replicas only matters if acks=all

Correct Answer: CDF
acks is a producer setting min.insync.replicas is a topic or broker setting and is only effective when acks=all

There are 3 producers writing to a topic with 5 partitions. There are 5 consumers consuming from the topic. How many Controllers will be present in the cluster?

1. A. 3
2. B. 5
3. C. 2
4. D. 1

Correct Answer: D
There is only one controller in a cluster at all times.