ITPEC IP April 2018 Question 21
ITPEC IP April 2018 — Question 21 of 100
A PC starts by executing the BIOS, then loads the operating system, and finally launches startup services. Firmware initializes and tests hardware and selects a boot device; the boot process loads the OS; after the OS is running, configured background services and startup applications begin.
Answer (a)
Why not others:
- the OS cannot start before firmware initializes the machine and begins the boot process
- startup services depend on the operating system and therefore run after it
- any sequence placing BIOS after the OS or services contradicts the boot dependency
Key rule: The startup chain proceeds from firmware initialization to OS loading to OS-managed services and applications.
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