What does hibernate do?

March 22, 2009



One of the selections on the shutdown selection on a laptop is “hibernate.” What does the hibernate option actually do?

A) CPU execution is halted but power continues to be provided to both CPU and memory.

B) All active processes are stopped and only RAM is powered.

C) The contents of memory are saved to disk and all power is halted.

D) The operating system shuts down, clears itself from memory, and the laptop powers off.


Answer: C) The contents of memory are saved to disk and all power is halted.

The hibernate process is a standard within the Advanced Configuration and Power Interface (ACPI) where all of the contents of memory are written to disk and all power on the system is disabled. This is both an efficient power-saving feature and useful for quickly resuming from where you left off.

The incorrect answers:
A) CPU execution is halted but power continues to be provided to both CPU and memory.
This is also an ACPI standard, but this is commonly known as “power-on standby.”

B) All active processes are stopped and only RAM is powered.
The “suspend-to-RAM” process is also known as “standby” or “sleep” mode.

D) The operating system shuts down, clears itself from memory, and the laptop powers off.
This describes a normal shutdown process for the operating system, not the hibernate process.

Want to know more? Watch “Optimizing and Upgrading Laptop and Portable Devices.”


As PC technicians, there’s often a need to upgrade or enhance the capabilities of our laptops and portable devices. In this video, we’ll show you the step-by-step processes that you can take to optimize and install memory, mini PCI cards, and hard drives inside laptops and portable devices.

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Category: CompTIA A+ Pop Quizzes

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