Which ACPI state turns the CPU and RAM off and copies the contents of RAM to a temporary file on the hard disk?

Question:
Which ACPI state turns the CPU and RAM off and copies the contents of RAM to a temporary file on the hard disk?

• S0
• S1
• S2
• S3
• S4

Explanation: The Advanced Configuration and Power Interface (ACPI) standard provides support for power states that are very important to mobile devices such as laptops.

S0 – The computer is on and CPU running.
S1 – CPU and RAM have power, but unused devices are powered down.
S2 – CPU is off; RAM is refreshed.
S3 – CPU is off; RAM is set to a slow refresh rate.
S4 – CPU and RAM are off (and RAM contents saved to a temp file).
S5 – The computer is off.

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