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Confluent Certified Developer for Apache Kafka Certification Examination Sample Questions:

1. What are two examples of performance metrics?
(Select two.)

A) total-login-attempts
B) fetch-rate
C) Number of active users
D) incoming-byte-rate
E) Number of active user sessions
F) Time of last failed login

2. (You are writing to a Kafka topic with producer configuration acks=all.
The producer receives acknowledgements from the broker but still creates duplicate messages due to network timeouts and retries.
You need to ensure that duplicate messages are not created.
Which producer configuration should you set?)

A) retries=2147483647max.in.flight.requests.per.connection=1enable.idempotence=true
B) enable.auto.commit=true
C) retries=2147483647max.in.flight.requests.per.connection=5enable.idempotence=false
D) retries=0max.in.flight.requests.per.connection=5enable.idempotence=true

3. 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.deadletterqueue.topic.name=DLQ-Topic
B) errors.log.enable=true
C) errors.tolerance=none
D) errors.log.include.messages=true
E) errors.deadletterqueue.context.headers.enable=true
F) errors.tolerance=all

4. You are sending messages to a Kafka cluster in JSON format and want to add more information related to each message:
Format of the message payload
Message creation time
A globally unique identifier that allows the message to be traced through the systemWhere should this additional information be set?

A) Key
B) Broker
C) Header
D) Value

5. (A consumer application runs once every two weeks and reads from a Kafka topic.
The last time the application ran, the last offset processed was 217.
The application is configured with auto.offset.reset=latest.
The current offsets in the topic start at 318 and end at 588.
Which offset will the application start reading from when it starts up for its next run?)

A) 218
B) 318
C) 0
D) 589

Solutions: