OPERATING SYSTEMS FOR COMPUTERS
COMPUTER OPERATING SYSTEMS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Runs after Windows loads
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Runs before you shut down
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Runs after you log in
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Runs before Windows loads
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Detailed explanation-1: -The BIOS starts the monitor and keyboard, and does some basic checks to make sure the computer is working properly. For example, it will look for the RAM. The BIOS then starts the boot sequence. It will look for the operating system.
Detailed explanation-2: -After loading the MBR into RAM, the BIOS runs the first instruction loaded from the MBR. The first instruction is typically the bootstrap code, aka the bootloader, which is a program written in machine code that loads the operating system into RAM.
Detailed explanation-3: -BIOS (basic input/output system) is the program a computer’s microprocessor uses to start the computer system after it is powered on. It also manages data flow between the computer’s operating system (OS) and attached devices, such as the hard disk, video adapter, keyboard, mouse and printer.
Detailed explanation-4: -When you first turn on your computer, the BIOS first performs some integrity checks of the HDD or SSD. Then, the BIOS searches for, loads, and executes the boot loader program, which can be found in the Master Boot Record (MBR). The MBR is sometimes on a USB stick or CD-ROM such as with a live installation of Linux.