CCDAK by Confluent Actual Free Exam Questions And Answers

Question 1

(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=0max.in.flight.requests.per.connection=5enable.idempotence=true

B. retries=2147483647max.in.flight.requests.per.connection=5enable.idempotence=false

C. enable.auto.commit=true

D. retries=2147483647max.in.flight.requests.per.connection=1enable.idempotence=true

Discussion 0

Correct Answer: D Vote an answer

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Question 2

You are developing a Java application using a Kafka consumer.
You need to integrate Kafka's client logs with your own application's logs using log4j2.
Which Java library dependency must you include in your project?

A. SLF4J implementation for Log4j 1.2 (org.slf4j:slf4j-log4j12)

B. SLF4J implementation for Log4j2 (org.apache.logging.log4j:log4j-slf4j-impl)

C. None, the right dependency will be added by the Kafka client dependency by transitivity.

D. Just the log4j2 dependency of the application

Discussion 0

Correct Answer: B Vote an answer

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Question 3

(Which configuration is valid for deploying a JDBC Source Connector to read all rows from the orders table and write them to the dbl-orders topic?)

A. {"name": "dbl-orders","connector.class": "io.confluent.connect.jdbc.DdbcSourceConnector","tasks.
max": "1","connection.url": "jdbc:mysql://mysql:3306/dbl?user=user&password=pas","topic.prefix":
"dbl-","table.blacklist": "ord*"}

B. {"name": "jdbc-source","connector.class": "io.confluent.connect.jdbc.JdbcSourceConnector","tasks.
max": "1","connection.url": "jdbc:mysql://mysql:3306/dbl?user=user&password=pas","topic.prefix":
"dbl-","table.whitelist": "orders"}

C. {"name": "jdbc-source","connector.class": "io.confluent.connect.jdbc.DdbcSourceConnector","tasks.
max": "1","connection.url": "jdbc:mysql://mysql:3306/dbl?user=user&useAutoAuth=true","topic.
prefix": "dbl-","table.whitelist": "orders"}

D. {"name": "orders-connect","connector.class": "io.confluent.connect.jdbc.DdbcSourceConnector","tasks.
max": "1","connection.url": "jdbc:mysql://mysql:3306/dbl","topic.whitelist": "orders","auto.create":
"true"}

Discussion 0

Correct Answer: B Vote an answer

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Question 4

A producer is configured with the default partitioner. It is sending records to a topic that is configured with five partitions. The record does not contain any key.
What is the result of this?

A. Records will be sent to the least used partition.

B. Records will be dispatched among the available partitions.

C. An error will be raised and no record will be sent.

D. Records will be sent to partition 0.

Discussion 0

Correct Answer: B Vote an answer

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Question 5

Which is true about topic compaction?

A. Topic compaction does not remove old events; instead, when clients consume events from a compacted topic, they store events in a hashmap that maintains the latest value.

B. Compaction will keep exactly one message per key after compaction of inactive log segments.

C. When a client produces a new event with an existing key, the broker immediately deletes the offset of the existing event.

D. When a client produces a new event with an existing key, the old value is overwritten with the new value in the compacted log segment.

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Correct Answer: B Vote an answer

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Question 6

Your Kafka cluster has five brokers. The topic t1 on the cluster has:
Two partitions
Replication factor = 4
min.insync.replicas = 3You need strong durability guarantees for messages written to topic t1.You configure a producer acks=all and all the replicas for t1 are in-sync.How many brokers need to acknowledge a message before it is considered committed?

A. 2

B. 4

C. 5

D. 3

Discussion 0

Correct Answer: D Vote an answer

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Question 7

(What are two stateless operations in the Kafka Streams API?
Select two.)

A. Join

B. GroupBy

C. Filter

D. Reduce

Discussion 0

Correct Answer: B,C Vote an answer

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Question 8

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. The producer is sending large batches of messages.

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. Compression is enabled.

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Correct Answer: C Vote an answer

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Question 9

(You are experiencing low throughput from a Java producer.
Kafka producer metrics show a low I/O thread ratio and low I/O thread wait ratio.
What is the most likely cause of the slow producer performance?)

A. The producer is sending large batches of messages.

B. The producer code has an expensive callback function.

C. There is a bad data link layer (Layer 2) connection from the producer to the cluster.

D. Compression is enabled.

Discussion 0

Correct Answer: B Vote an answer

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Question 10

You have a Kafka client application that has real-time processing requirements.
Which Kafka metric should you monitor?

A. Aggregate incoming byte rate

B. Consumer heartbeat rate to group coordinator

C. Total time to serve requests to replica followers

D. Consumer lag between brokers and consumers

Discussion 0

Correct Answer: D Vote an answer

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Confluent Certified Developer for Apache Kafka Certification Examination - CCDAK Exam Practice Test

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