3.4 - The BIOS Flashcards
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What does the BIOS do when you start your computer?
The BIOS (Basic Input Output System) starts up when you hit the power button, initializes memory and the CPU, performs a POST (Power On Self-Test), and looks for a boot drive to start the operating system.
What is another term for BIOS and what does it refer to?
BIOS is sometimes referred to as firmware, system BIOS, ROM BIOS, or ROM/flash memory.
What does the POST (Power On Self-Test) check for?
POST checks to see if memory, CPU, video, and input devices (such as keyboard or mouse) are present.
What happens if the BIOS finds a boot drive?
The BIOS looks for a boot loader installed on the boot drive to start the operating system.
Where is the flash memory used by the BIOS typically located?
On the motherboard.
What is the purpose of having both a main BIOS config and a backup BIOS config?
To allow upgrading the BIOS and revert back to the previous version if something goes wrong with the upgrade.
What is the legacy BIOS and how long has it been around?
The legacy BIOS is an older text-based BIOS that has been around for about 25 years.
What limitations does the legacy BIOS have?
It does not allow for configuration changes, upgrades, or adding additional drivers.
What is UEFI and how does it differ from legacy BIOS?
UEFI stands for Unified Extensible Firmware Interface. It is a modern standard form of BIOS designed to replace the legacy BIOS and can be used across multiple manufacturers.
What is the EFI standard?
The EFI standard, created by Intel, is also known as the Extensible Firmware Interface standard, and it allows many manufacturers to create standardized BIOS features and capabilities.
What categories are typically found in a UEFI BIOS?
Main, Security, Advanced, and UEFI Drivers.
What can you do in the Main section of a UEFI BIOS?
View system information, modify date and time, and perform diagnostics.
What is managed under the Security category in UEFI BIOS?
Adding or managing user and administrator passwords.
What can be configured in the Advanced tab of a UEFI BIOS?
Boot options and other system startup settings.
