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Confluent CCDAK Exam Practice Questions (P. 1)

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Question #1
You need to consume messages from Kafka using the command-line interface (CLI).
Which command should you use?
  1. A
    kafka-console-consumer
  2. B
    kafka-consumer
  3. C
    kafka-get-message
  4. D
    kafka- consume

Correct Answer: A ?️

Question #2
You are experiencing low throughput from a Java producer. You monitor the Kafka metrics and notice that the metrics for that producer show low I/O thread ratio and low I/O thread wait ratio.
What is the most likely the cause of the slow producer performance?
  1. A
    Compression is enabled.
  2. B
    The producer is sending large batches of messages.
  3. C
    There is a bad data link layer (layer 2) connection from the producer to the cluster.
  4. D
    The producer code has an expensive callback function.

Correct Answer: D ?️

Question #3
Which configuration is valid for deploying a JDBC Source Connector to read all the rows from orders table and write it to db1-orders topic?
  1. A
    {
    "name":"jdbc-source",
    "connector.class": "io.confluent.connect.jdbc.JdbcSourceConnector",
    "tasks.max": "1",
    "connection.url": "jdbc:mysql://mysql:3306/db1?user=user&password=password&useSSL=false",
    "topic.prefix": "db1-",
    "table.whitelist": "orders"
    }
  2. B
    {
    "name":"db1-orders".
    "connector.class": "io.confluent.connect.jdbc.JdbcSourceConnector",
    "tasks.max": "1",
    "connection.url": "jdbc:mysql://mysql:3306/db1?user=user&password=password&useSSL=false",
    "topic.prefix": "db1-",
    "table.blacklist": "ord*"
    }
  3. C
    {
    "name":"orders-connect",
    "connector.class": "io.confluent.connect.jdbc.JdbcSourceConnector",
    "tasks.max": "1",
    "connection.url": "jdbc:mysql://mysql:3306/db1",
    "topic.whitelist": "orders",
    "auto.create": "true"
    }
  4. D
    {
    "name":"jdbc-source",
    "connector.class": "io.confluent.connect.jdbc.JdbcSourceConnector",
    "tasks.max": "1",
    "connection.url": "jdbc:mysql://mysql:3306/db1?user=user&useAutoAuthentication=true", "topic.prefix": "db1-",
    "table.whitelist": "orders"
    }

Correct Answer: A ?️

Question #4
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 Topic.
You need to perform Unit Test on your Kafka Streams application.
Which should you use?
  1. A
    TopologyTestDriver
  2. B
    MockProducer, MockConsumer
  3. C
    TestProducer, TestСonsumer
  4. D
    KafkaUnitTestDriver

Correct Answer: A ?️

Question #5
Which two statements are correct about transactions in Kafka? (Choose two.)
  1. A
    All messages from a failed transaction will be deleted from a Kafka topic.
  2. B
    Transactions are only possible when writing messages to a topic with single partition.
  3. C
    Consumers can consume both committed and uncommitted transactions.
  4. D
    Information about producers and their transactions is stored in the '__transaction_state' topic.
  5. E
    Transactions guarantee at least once delivery of messages.

Correct Answer: CD ?️

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