MCQ Detailed View

When a computer starts (boots up), the operating system is loaded from the hard drive or SSD into RAM. This is because RAM is much faster than permanent storage devices, and the CPU can directly access and execute data and instructions stored in RAM.

Here’s how it works in simple terms: When you press the power button, the Basic Input Output System (BIOS) or UEFI stored in ROM is activated first. The BIOS performs a self-test (POST) and then looks for the bootable operating system. Once found, the BIOS loads the necessary parts of the operating system (like the kernel) into RAM so the CPU can begin using it.