Answer:
During booting or initialstartup phase, the firmware bootstrap loader program uses hardware configuration settings stored in nonvolatile memory to determine what devices can start an OS and the order in which the system will search these devices.
Step-by-step explanation:
As a computer is turned on, the booting, startup sets the initial sequence of operations of the system, the chain reaction which loads the entire operating system is known as the boot loader or bootstrap loader, from the central processing unit to execute only code found in the systems memory, stored on nonvolatile memories or mass storage devices. At boot time, the operating system is not really loaded and the computer’s hardware cannot peform many complex systems actions.