What is the default value of auto.commit.interval.ms?

• A. 1000
• B. 0
• C. 5000
• D. 10000

Answer: (C)

Auto commit offsets is a feature that lets the consumer record the messages it has processed without explicit commit calls from the application. The interval controls how often those automatic commits happen. By default, the consumer commits offsets every five seconds while auto-commit is enabled. This means the offset state is updated in the broker at roughly five-second intervals, which can influence how much work could be redelivered if the consumer restarts or if processing takes longer than expected.

If you need more frequent durability, you could reduce the interval, which increases commit overhead but lowers the chance of reprocessing. If you want to reduce overhead and can tolerate some reprocessing risk, you could increase the interval. The five-second value shown in common configurations is the standard default.