Which command shifts offsets by 2 positions backward for a consumer group on a topic?

Which command shifts offsets by 2 positions backward for a consumer group on a topic?

• A. bin/kafka-consumer-groups --bootstrap-server localhost:9092 --group my-first-consumer-group --reset-offsets --shift-by 2 --execute --topic my-first_topic
• B. bin/kafka-consumer-groups.sh --bootstrap-server localhost:9092 --describe -group my-first-consumer-group --reset-offsets --to-earliest --execute --topic my-first-topic
• C. bin/kafka-consumer-groups --bootstrap-server localhost:9092 --group my-first-consumer-group --reset-offsets --shift-by -2 --execute --topic my-first_topic
• D. bin/kafka-consumer-groups --bootstrap-server localhost:9092 --group my-first-consumer-group --reset-offsets --to-latest --execute --topic my-first_topic

Answer: (D)

Shifting offsets backward by a fixed amount is done with the reset-offsets command using a negative value for the shift parameter. The --shift-by option moves the committed offset by the given number of positions for each partition of the topic. A negative value means moving to earlier messages, so offsets are reduced by that amount and the consumer group will reprocess earlier data. In this case, to move backward by 2 positions, you would use --shift-by -2, applied with --group, --topic, and the other required flags, for example: bin/kafka-consumer-groups --bootstrap-server localhost:9092 --group my-first-consumer-group --reset-offsets --topic my-first_topic --shift-by -2 --execute. Using a positive shift (like --shift-by 2) would move forward by two messages, not backward. Using --to-earliest would reset to the earliest available offsets, and --to-latest would jump to the latest offsets, neither of which corresponds to shifting by a fixed backward amount.

Shifting offsets backward by a fixed amount is done with the reset-offsets command using a negative value for the shift parameter. The --shift-by option moves the committed offset by the given number of positions for each partition of the topic. A negative value means moving to earlier messages, so offsets are reduced by that amount and the consumer group will reprocess earlier data.

In this case, to move backward by 2 positions, you would use --shift-by -2, applied with --group, --topic, and the other required flags, for example: bin/kafka-consumer-groups --bootstrap-server localhost:9092 --group my-first-consumer-group --reset-offsets --topic my-first_topic --shift-by -2 --execute.

Using a positive shift (like --shift-by 2) would move forward by two messages, not backward. Using --to-earliest would reset to the earliest available offsets, and --to-latest would jump to the latest offsets, neither of which corresponds to shifting by a fixed backward amount.