Java Consumer

The video tutorial guides viewers through creating a Java class for a Kafka consumer. It covers setting up a logger, configuring consumer properties, creating a consumer, subscribing to topics, and polling data. The tutorial explains key concepts like deserialization, consumer configuration, and processing records from Kafka topics.

What is the first step in setting up a new Java class for a Kafka consumer?

• Create a new Java class

• Set up a consumer config

• Create a logger

• Initialize properties

Which library is used for logging in the Consumer Demo?

• java.util.logging

• org.slf4j

• log4j

• java.logging

What is the purpose of a deserializer in Kafka consumer configuration?

• To configure bootstrap servers

• To manage consumer offsets

• To convert bytes into strings

• To serialize strings into bytes

Which configuration option determines where a consumer starts reading messages in a topic?

• key.deserializer

• bootstrap.servers

• auto.offset.reset

• group.id

What is the default behavior of the 'auto.offset.reset' configuration if not set?

• Read from a random offset

• Throw an error

• Read from the latest message

• Read from the earliest message

How do you subscribe a Kafka consumer to a single topic?

• Using consumer.poll() with a timeout

• Using consumer.assign() with a partition

• Using consumer.subscribe() with a pattern

• Using consumer.subscribe() with a collection

What is the recommended method to handle deprecated poll calls in Kafka 2.0?

• Ignore the deprecation warning

• Use a different API

• Use a duration object

• Use a longer timeout

What information can be logged from a consumer record?

• Key, value, offset, timestamp

• Key, value, partition, offset

• Key, value, timestamp, offset

• Key, value, partition, timestamp

In what order does a Kafka consumer read messages from partitions?

• Based on message timestamp

• Based on message key

• Sequentially from partition 0 to N

• Random order

How can you stop a running Kafka consumer in the demo?

• Close the IDE

• Terminate the process

• Click the exit sign

• Press the stop button