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a small program that invokes operating system when power is switched on. That is boot loader. boot is a boot strapping process that is one program pulls may complected programs when power is switched on.
Ntldr
A Mac will start from BootROM which passes control to either the BootX (PowerPC) or boot.efi (Intel) boot loader.
ntldr (NT Loader)
Boot is the 'verb' . Boot loader is the set of code which is executed while computer boots.
Also known as bootstrapping or boot loader, a bootstrap loader is a program that resides in the computers EPROM, ROM, or other non-volatile memory that automatically executed by the processor when the computer is turned on. The bootstrap loader reads the hard disk drives boot sector to continue the process of loading the computers operating system. The boot loader has been replaced in computers that have an Extensible Firmware Interface (EFI). The boot loader is now part of the EFI BIOS. Source: http://www.computerhope.com/jargon/b/bootload.htm
strep boot
Following are the boot loader features of windows 7: a) Windows Boot Manager(Bootmgr.exe) b) Windows Operating System loader c) Windows Resume Loader
In order to answer the question, one would need to know for which operating system the "bootstrap loader" or boot loader is intended. There have been many boot loaders since electronic computers capable of running stored programs were first developed. Some of the earliest bootstrap loaders had no name at all; they were merely a list of steps one would execute to flip switches on the front panel of a computer to enter a rudimentary set of instructions that would allow the computer to finish loading its operating program from a paper tape reader or stack of punched cards. One popular boot loader used with Linux systems today is called GRUB, which stands for "Grand Unified Boot Loader".
The boot loader performs POST.The boot loader is loaded from RAM.The boot loader initializes the flash file system that is used to boot the system
grub ana LILO are the two boot loader in Linux
boot loader