Which Is Loaded into Memory When System Is Booted?

Kernel is loaded into memory when system is booted.

Are loaded into main memory when the computer is booted?

A boot loader is loaded into main memory from persistent memory, such as a hard disk drive or, in some older computers, from a medium such as punched cards, punched tape, or magnetic tape. The boot loader then loads and executes the processes that finalize the boot.

Which program is loaded first in main memory when computer is on?

The operating system is the first program loaded into memory when the computer starts (boots). When power is turned on, the CPU begins executing the instructions stored in the CMOS chip.