Question

The system periodically performs checkpoints that consists of the following operation(s) ____________

(a) Putting all the log records currently in main memory onto stable storage

(b) putting all modified data residing in main memory onto stable storage

(c) putting a log record  onto stable storage

(d) all of the mentioned

I have been asked this question in a national level competition.

I need to ask this question from Atomic Transactions in section Process Synchronization of Operating System

Answer 1

The correct answer is (d) all of the mentioned

To explain: None.