TestOut LabSim A+ Certification Practice Exam

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Which ACPI power state allows the RAM to retain its contents while shutting off other components?

Sleep
Hibernate
Shut down
Suspend

The correct answer is: Suspend

The ACPI power state that allows the RAM to retain its contents while shutting off other components is Sleep, which might also be referred to as Suspend in some contexts. In this state, the system enters a low-power mode where the CPU and other components, except for the RAM, are powered down. This allows the system to quickly resume operation without losing any data in memory, as the contents of RAM are preserved. The terminology can vary, as "Suspend" is often used interchangeably with "Sleep." The key characteristic of this state is that it provides a balance between energy conservation and the ability to quickly wake the system back up, which is ideal for portable devices and laptops. In contrast, hibernation saves the system's state to a hard drive and completely powers off, while shutting down turns off the system without preserving RAM contents.