Which command demonstrates consuming messages from a topic as a specific group and from the beginning?

Which command demonstrates consuming messages from a topic as a specific group and from the beginning?

• A. bin/kafka-console-consumer.sh --bootstrap-server localhost:9092 --topic my-first-topic
• B. bin/kafka-console-consumer.sh --bootstrap-server localhost:9092 --topic my-first-topic --group my-first-consumer-group
• C. bin/kafka-console-consumer.sh --bootstrap-server localhost:9092 --topic my-first-topic --group my-first-consumer-group --from-beginning
• D. bin/kafka-console-consumer.sh --bootstrap-server localhost:9092 --topic my-first-topic --from-beginning

Answer: (D)

You’re being tested on how to both join a named consumer group and start from the very beginning of the topic’s log. To achieve that, you need two settings: assign the consumer to a specific group and tell Kafka to read from the earliest offset. The group option ensures offsets are tracked per that named group, while the from-beginning option makes the client ignore any existing committed offsets and start with the oldest messages in each partition. When both are used together, you’re clearly consuming as a specific group and from the start, which is exactly the scenario described. The command that matches this is the one that includes both the group specification and the from-beginning flag. The other forms either omit the group (which uses a generated or default group) or omit starting from the beginning (which would resume from the last committed offset for that group).

You’re being tested on how to both join a named consumer group and start from the very beginning of the topic’s log. To achieve that, you need two settings: assign the consumer to a specific group and tell Kafka to read from the earliest offset. The group option ensures offsets are tracked per that named group, while the from-beginning option makes the client ignore any existing committed offsets and start with the oldest messages in each partition. When both are used together, you’re clearly consuming as a specific group and from the start, which is exactly the scenario described. The command that matches this is the one that includes both the group specification and the from-beginning flag. The other forms either omit the group (which uses a generated or default group) or omit starting from the beginning (which would resume from the last committed offset for that group).