(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": "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"}
• 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": "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"}

(You are developing a Java application that includes a Kafka consumer.
You need to integrate Kafka client logs with your own application logs.
Your application is using the Log4j2 logging framework.
Which Java library dependency must you include in your project?)

• A. SLF4J implementation for Log4j2 (org.apache.logging.log4j:log4j-slf4j-impl)
• B. SLF4J implementation for Log4j 1.2 (org.slf4j:slf4j-log4j12)
• C. Just the Log4j2 dependency of the application
• D. None, the correct dependency will be added transitively by the Kafka client

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 code has an expensive callback function.
• B. Compression is enabled.
• C. The producer is sending large batches of messages.
• D. There is a bad data link layer (layer 2) connection from the producer to the cluster.

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. 3
• B. 2
• C. 4
• D. 5

You create a producer that writes messages about bank account transactions from tens of thousands of different customers into a topic.
Your consumers must process these messages with low latency and minimize consumer lag Processing takes ~6x longer than producing Transactions for each bank account must be processed in orderWhich strategy should you use?

• A. Use a combination of the bank account number and the transaction timestamp as the message key.
• B. Use the bank account number found in the message as the message key.
• C. Use a unique identifier such as a universally unique identifier (UUID) as the message key.
• D. Use the timestamp of the message's arrival as its key.