Join 60,000+ competitive exam aspirants
or with email
Your Cart
SubtotalтВ╣0
TotalтВ╣0
Examoogle тАв User тАв info@examoogle.com тАв EE-2024-8821
Chapter 1 of 12 тАв Page 1 of 248ЁЯФТ Protected PDF тАв Watermarked
Join 60,000+ competitive exam aspirants
Which power-saving mode in Windows OS saves your open documents and running programs to the hard disk before turning off the power completely?
Sleep mode
Hibernate mode
Standby mode
Away mode
Hibernate mode
Hibernate mode is a power-saving state that writes the current contents of the system's Random Access Memory (RAM) to a non-volatile storage medium, typically the hard disk drive (HDD) or solid-state drive (SSD), before powering off the computer entirely. This allows the system to consume zero power while maintaining the current workspace state.
ACPI 6.5 Specification, Section 7.3 (System Sleep States)
Hibernate mode is a power-saving state that writes the current contents of the system's Random Access Memory (RAM) to a non-volatile storage medium, typically the hard disk drive (HDD) or solid-state drive (SSD), before powering off the computer entirely. This allows the system to consume zero power while maintaining the current workspace state.
Power┬аConsumptionтЙИ0┬аW during Hibernation state
Restoration┬аTimeтИЭMemory┬аCapacity/Disk┬аI/O┬аBandwidth
When Hibernation is initiated, the Windows kernel triggers the creation of a system file named 'hiberfil.sys'. The entire volatile memory contents are serialized and written to this file. Once the write operation is complete and verified, the power supply unit (PSU) is signaled to cut power to the motherboard and peripherals, effectively reaching an S4 sleep state as defined by ACPI standards.
Hibernate mode corresponds to the ACPI S4 sleep state.
Data is stored in the 'hiberfil.sys' file in the root directory of the system drive.
Unlike Sleep mode, Hibernation does not require a constant power supply to maintain memory contents.
Resuming from hibernation involves reading the 'hiberfil.sys' file back into RAM, which is slower than resuming from Sleep mode.
Consumes no electricity while the machine is off
Allows users to resume exactly where they left off without closing applications
Protects data integrity during complete power loss or battery depletion
Requires disk space equal to or greater than the installed RAM
Resuming takes significantly longer than Sleep mode
Reduces total write endurance for SSDs slightly due to large memory dump writes
Laptops on long-term storage
Systems in environments with unstable power supplies
Workflows requiring multi-day session persistence
| Feature | Sleep Mode | Hibernate Mode |
|---|---|---|
Memory State | Maintained in RAM | Written to Disk (hiberfil.sys) |
Power Consumption | Low (Standby) | Zero |
Sleep mode (S3) maintains power to RAM to keep data accessible immediately.
Hybrid Sleep is a combination where data is saved to both RAM and disk, common in desktops for power failure protection.
Option A/C (Sleep/Standby) keeps the system in a low-power state, not a power-off state.
B is correct тАФ Hibernate mode writes the contents of RAM to the storage disk before shutting down the computer entirely.
Always remember that 'S3' refers to Sleep/Standby and 'S4' refers to Hibernation in the context of ACPI power management exams.
Get instant step-by-step AI explanations, full shift Previous Year Papers (SSC GD, RRB, SSC JE), and regional rank analysis on the official Examoogle App.
Free Download тАв 100K+ Aspirants