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Confluent CCDAK Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Kafka Streams and Processing | - Event processing patterns
|
| Kafka Ecosystem and Confluent Platform | - ksqlDB and connectors
|
| Kafka Fundamentals | - Kafka architecture and core concepts
|
| Kafka Producers and Consumers | - Consumer API
|
Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:
You are experiencing low throughput from a Java producer.
Metrics show low I/O thread ratio and low I/O thread wait ratio.
What is the most likely cause of the slow producer performance?
- A. Compression is enabled.
- B. There is a bad data link layer (layer 2) connection from the producer to the cluster.
- C. The producer code has an expensive callback function.
- D. The producer is sending large batches of messages.
Correct Answer: C 🗳️
Explanation: Only visible for Actual4Exams members. You can sign-up / login (it's free).
(You create an Orders topic with 10 partitions.
The topic receives data at high velocity.
Your Kafka Streams application initially runs on a server with four CPU threads.
You move the application to another server with 10 CPU threads to improve performance.
What does this example describe?)
- A. Vertical Scaling
- B. Plain Scaling
- C. Horizontal Scaling
- D. Scaling Out
Correct Answer: A 🗳️
Explanation: Only visible for Actual4Exams members. You can sign-up / login (it's free).
The producer code below features a Callback class with a method called onCompletion().
When will the onCompletion() method be invoked?
- A. When the producer puts the message into its socket buffer
- B. When a consumer sends an acknowledgement to the producer
- C. When the producer receives the acknowledgment from the broker
- D. When the producer batches the message
Correct Answer: C 🗳️
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(What are two stateless operations in the Kafka Streams API?
Select two.)
- A. Reduce
- B. GroupBy
- C. Join
- D. Filter
Correct Answer: B,D 🗳️
Explanation: Only visible for Actual4Exams members. You can sign-up / login (it's free).
What is accomplished by producing data to a topic with a message key?
- A. Kafka brokers allow you to add more partitions to a given topic, without impacting the data flow for existing keys.
- B. Consumers can filter messages in real time based on the message key without processing unrelated messages.
- C. Messages with the same key are routed to a deterministically selected partition, enabling order guarantees within that partition.
- D. It provides a mechanism for encrypting messages at the partition level to ensure secure data transmission.
Correct Answer: C 🗳️
Explanation: Only visible for Actual4Exams members. You can sign-up / login (it's free).
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