CCDAK Free Practice Test

There are 3 brokers in the cluster. You want to create a topic with a single partition that is resilient to one broker failure and one broker maintenance. What is the replication factor will you specify while creating the topic?

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

Correct Answer: B
1 is not possible as it doesn't provide resilience to failure, 2 is not enough as if we take a broker down for maintenance, we cannot tolerate a broker failure, and 6 is impossible as we only have 3 brokers (RF cannot be greater than the number of brokers). Here the correct answer is 3

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

1. A. Kafka will automatically create the topic with 1 partition and 1 replication factor
2. B. Kafka will automatically create the topic with the indicated producer settings num.partitions and default.replication.factor
3. C. Kafka will automatically create the topic with the broker settings num.partitions and default.replication.factor
4. 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

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.

Which actions will trigger partition rebalance for a consumer group? (select three)

1. A. Increase partitions of a topic
2. B. Remove a broker from the cluster
3. C. Add a new consumer to consumer group
4. D. A consumer in a consumer group shuts down Add a broker to the cluster

Correct Answer: ACD
Rebalance occurs when a new consumer is added, removed or consumer dies or paritions increased.