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

How do you create a topic named test with 3 partitions and 3 replicas using the Kafka CLI?

1. A. bin/kafka-topics.sh --create --broker-list localhost:9092 --replication-factor 3 --partitions 3--topic test
2. B. bin/kafka-topics-create.sh --zookeeper localhost:9092 --replication-factor 3 --partitions 3--topic test
3. C. bin/kafka-topics.sh --create --bootstrap-server localhost:9092 --replication-factor 3 -- partitions 3 --topic test
4. D. bin/kafka-topics.sh --create --bootstrap-server localhost:2181 --replication-factor 3 -- partitions 3 --topic test

Correct Answer: C
As of Kafka 2.3, the kafka-topics.sh command can take --bootstrap-server localhost:9092 as an argument. You could also use the (now deprecated) option of --zookeeper localhost:2181.

If you enable an SSL endpoint in Kafka, what feature of Kafka will be lost?

1. A. Cross-cluster mirroring
2. B. Support for Avro format
3. C. Zero copy
4. D. Exactly-once delivery

Correct Answer: C
With SSL, messages will need to be encrypted and decrypted, by being first loaded into the JVM, so you lose the zero copy optimization. See more information herehttps://twitter.com/ijuma/status/1161303431501324293?s=09

To allow consumers in a group to resume at the previously committed offset, I need to set the proper value for...

1. A. value.deserializer
2. B. auto.offset.resets
3. C. group.id
4. D. enable.auto.commit

Correct Answer: C
Setting a group.id that's consistent across restarts will allow your consumers part of the same group to resume reading from where offsets were last committed for that group

To produce data to a topic, a producer must provide the Kafka client with...

1. A. the list of brokers that have the data, the topic name and the partitions list
2. B. any broker from the cluster and the topic name and the partitions list
3. C. all the brokers from the cluster and the topic name
4. D. any broker from the cluster and the topic name

Correct Answer: D
All brokers can respond to a Metadata request, so a client can connect to any broker in the cluster and then figure out on its own which brokers to send data to.