Free CCDAK Exam Braindumps

The exactly once guarantee in the Kafka Streams is for which flow of data?

1. A. Kafka => Kafka
2. B. Kafka => External
3. C. External => Kafka

Correct Answer: A
Kafka Streams can only guarantee exactly once processing if you have a Kafka to Kafka topology.

How does a consumer commit offsets in Kafka?

1. A. It directly sends a message to the consumer_offsets topic
2. B. It interacts with the Group Coordinator broker
3. C. It directly commits the offsets in Zookeeper

Correct Answer: B
Consumers do not directly write to the consumer_offsets topic, they instead interact with a broker that has been elected to manage that topic, which is the Group Coordinator broker

There are two consumers C1 and C2 belonging to the same group G subscribed to topics T1 and T2. Each of the topics has 3 partitions. How will the partitions be assigned to consumers with Partition Assigner being Round Robin Assigner?

1. A. C1 will be assigned partitions 0 and 2 from T1 and partition 1 from T2. C2 will have partition 1 from T1 and partitions 0 and 2 from T2.
2. B. Two consumers cannot read from two topics at the same time
3. C. C1 will be assigned partitions 0 and 1 from T1 and T2, C2 will be assigned partition 2 from T1 and T2.
4. D. All consumers will read from all partitions

Correct Answer: A
The correct option is the only one where the two consumers share an equal number of partitions amongst the two topics of three partitions. An interesting article to read ishttps://medium.com/@anyili0928/what-i-have-learned-from-kafka-partition-assignment- strategy-799fdf15d3ab

You want to sink data from a Kafka topic to S3 using Kafka Connect. There are 10 brokers in the cluster, the topic has 2 partitions with replication factor of 3. How many tasks will you configure for the S3 connector?

1. A. 10
2. B. 6
3. C. 3
4. D. 2

Correct Answer: D
You cannot have more sink tasks (= consumers) than the number of partitions, so 2.

What's is true about Kafka brokers and clients from version 0.10.2 onwards?

1. A. Clients and brokers must have the exact same version to be able to communicate
2. B. A newer client can talk to a newer broker, but an older client cannot talk to a newer broker
3. C. A newer client can talk to a newer broker, and an older client can talk to a newer broker
4. D. A newer client can't talk to a newer broker, but an older client can talk to a newer broker

Correct Answer: C
Kafka's new bidirectional client compatibility introduced in 0.10.2 allows this. Read more herehttps://www.confluent.io/blog/upgrading-apache-kafka-clients-just-got-easier/