CCAAK Exam Dumps : Confluent Certified Administrator for Apache Kafka

When sizing a ksqlDB cluster, the following factors are crucial:

A. Data Schema: Complex schemas may require more CPU/memory for serialization/deserialization.

B. Number of Queries: Each persistent query consumes system resources (CPU, memory).

C. Number of Partitions: Determines parallelism and state store scalability.

From Confluent documentation:

“Cluster capacity planning depends on schema complexity, query concurrency, and partition count.”

D → Incorrect: Encryption impacts producer/broker, not ksqlDB sizing directly.

E → Incorrect: Retention is managed by Kafka, not ksqlDB.

Page Reference:

Kafka: The Definitive Guide, 1st Edition, Chapter 7, p. 225–229

Confluent ksqlDB Documentation: Capacity Planning Guidelines

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To increase throughput, Kafka recommends allowing larger batches and giving more time for the producer to accumulate records into batches:

batch.size: Increasing this allows more records to be sent in a single request.

linger.ms: Increasing this adds a delay so that the producer can accumulate more messages into a batch.

From Kafka documentation:

“Increasing both batch.size and linger.ms allows the producer to send larger, more efficient batches, improving throughput at the cost of slightly increased latency.”

Page Reference:

Kafka: The Definitive Guide, 1st Edition, Chapter 5, p. 162–163

Apache Kafka Documentation: Producer Configuration Parameters

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Kafka architecture maintains exactly one active Controller at any given time, regardless of the number of brokers. The Controller is responsible for administrative tasks like partition leader election and topic creation. The remaining brokers are replicas, ready to take over if the Controller fails.

From Kafka documentation:

“At any given time, there is only one active controller in the Kafka cluster.”

Even in a cluster with 4 brokers, only 1 broker acts as the Controller.

Page Reference:

Kafka: The Definitive Guide, 1st Edition, Chapter 6, p. 189

Apache Kafka Documentation: Controller Role Description

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