Which of the following is an industry standard that provides functionality similar to (and intended to replace) the legacy PC BIOS during the boot process?
POST
MBR
UEFI
GRUB
UEFI (Unified Extensible Firmware Interface) is a modern, industry-standard firmware specification that initializes hardware and hands control to the operating system-replacing the legacy BIOS in most new PCs. POST is merely a diagnostic routine executed by firmware, GRUB is a software boot loader that runs after firmware, and MBR is a disk partitioning scheme; none of these act as a full firmware interface like BIOS or UEFI.
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