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Confluent CCDAK Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Kafka Streams and Processing | - Kafka Streams API
|
| Kafka Producers and Consumers | - Consumer API
|
| Kafka Ecosystem and Confluent Platform | - ksqlDB and connectors
|
| Kafka Fundamentals | - Data flow in Kafka
|
Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:
You need to configure a sink connector to write records that fail into a dead letter queue topic. Requirements:
Topic name: DLQ-Topic
Headers containing error context must be added to the messagesWhich three configuration parameters are necessary?(Select three.)
- A. errors.log.enable=true
- B. errors.tolerance=none
- C. errors.tolerance=all
- D. errors.deadletterqueue.context.headers.enable=true
- E. errors.deadletterqueue.topic.name=DLQ-Topic
- F. errors.log.include.messages=true
Correct Answer: C,D,E 🗳️
Explanation: Only visible for Lead2Passed members. You can sign-up / login (it's free).
Match the testing tool with the type of test it is typically used to perform.
Reveal Solution Discussion 0Correct Answer:
Explanation:
Unit Testing # MockProducer
Integration Testing # Testcontainers
Performance Testing # Trogdor
Mock Data Generation # Connect Datagen
MockProducer: Simulates a Kafka producer in unit tests (no real broker interaction).
Testcontainers: Spawns Kafka in Docker for real environment testing.
Trogdor: Kafka's built-in performance load testing framework.
Connect Datagen: Creates sample source records for test and demo purposes.
From Kafka Developer Tools Guide:
"Kafka developers commonly use MockProducer for unit tests, Testcontainers for integration, and Trogdor for performance tests." Reference: Kafka Testing and Tools Overview
(You are developing a Kafka Streams application with a complex topology that has multiple sources, processors, sinks, and sub-topologies.
You are working in a development environment and do not have access to a real Kafka cluster or topics.
You need to perform unit testing on your Kafka Streams application.
Which should you use?)
- A. TestProducer, TestConsumer
- B. KafkaUnitTestDriver
- C. MockProducer, MockConsumer
- D. TopologyTestDriver
Correct Answer: D 🗳️
Explanation: Only visible for Lead2Passed members. You can sign-up / login (it's free).
What is accomplished by producing data to a topic with a message key?
- A. It provides a mechanism for encrypting messages at the partition level to ensure secure data transmission.
- B. Messages with the same key are routed to a deterministically selected partition, enabling order guarantees within that partition.
- C. Kafka brokers allow you to add more partitions to a given topic, without impacting the data flow for existing keys.
- D. Consumers can filter messages in real time based on the message key without processing unrelated messages.
Correct Answer: B 🗳️
Explanation: Only visible for Lead2Passed members. You can sign-up / login (it's free).
What are two examples of performance metrics?
(Select two.)
- A. fetch-rate
- B. Time of last failed login
- C. Number of active user sessions
- D. Number of active users
- E. total-login-attempts
- F. incoming-byte-rate
Correct Answer: A,F 🗳️
Explanation: Only visible for Lead2Passed members. You can sign-up / login (it's free).
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