Which of the following sleep modes is also known as Hibernation in Windows operating systems?

A.
S3

B.
S2

C.
S4

D.
S1

Explanation:

The S4 sleep mode is also known as Hibernation or hibernate mode in Windows operating systems.
Hibernate mode is a power saving feature for computers. In hibernate mode, the current state of a
computer is saved to the hard disk, and the computer shuts down. A user will have to power on the
computer to restore the previous settings. When a computer resumes from hibernate mode, it reads
the saved settings from the disk and restores the system state as it was before it entered hibernate
mode. By default, hibernate mode is disabled. If a computer is not ACPI-enabled or APM-enabled,
users will have to enter hibernate mode manually. Users cannot set the computer to automatically
hibernate after a certain time. With ACPI-enabled and APM-enabled computers, users are able to set
hibernate mode automatically.
Answer option D is incorrect. The S1 mode is the most power hungry sleep mode. In this mode, the
CPU stops executing instructions and the processor cash is flushed, but power is still supplied to the
CPU and memory. All other unused devices are powered down.Answer option B is incorrect. The S2
mode uses less power than S1 mode. In this mode, the computer’s processor is powered down.
Answer option A is incorrect. The S3 mode is also known as Stand by mode. In this mode, the
computer supplies power only to the RAM. This mode is also known as Suspend to RAM.