Answer
See the explanation
Work Step by Step
When you turn on a PC, the following sequence of activities typically occurs:
1. Power On Self Test (POST): The computer's hardware components are tested to ensure they are functioning properly. This includes checking the processor, memory (RAM), storage drives, and other essential components.
2. BIOS/UEFI Initialization: The Basic Input/Output System (BIOS) or Unified Extensible Firmware Interface (UEFI) initializes. This firmware is responsible for initializing hardware components, loading the operating system, and providing basic input/output services to the operating system and installed software.
3. BIOS/UEFI Splash Screen : A manufacturer-specific splash screen may appear briefly, displaying the computer's brand logo or a prompt to enter BIOS/UEFI settings.
4. Pre-boot Environment Messages: These messages typically appear before the booting process begins and provide information about hardware status, configuration settings, and options to access BIOS/UEFI settings or perform diagnostic tasks. Examples of messages include:
- System information such as processor type and speed, memory amount, and BIOS/UEFI version.
- Key prompts to enter BIOS/UEFI settings, such as pressing F2 or Del.
- Error messages indicating hardware issues or configuration problems.
5. Boot Device Selection: If multiple boot devices are detected (e.g., hard drive, solid-state drive, USB drive), the user may be prompted to select the desired boot device from a list.
6. Operating System Loading: Once the boot device is selected, the operating system loader (e.g., GRUB for Linux, Windows Boot Manager for Windows) loads the operating system kernel into memory and begins the boot process.
The software responsible for displaying these pre-boot environment messages is the system firmware, which includes BIOS or UEFI. These messages are typically generated by the firmware itself and are designed to provide users with information about the system's status and options for configuration or troubleshooting.
