In MS-DOS, when power is turned on, BIOS performs the following tasks: The…
2023
In MS-DOS, when power is turned on, BIOS performs the following tasks:
The rest of the operating system is pulled in.
A small portion of the operating system, known as the boot loader, is located.
The rest of the operating system is stored in main memory.
The boot loader is loaded into main memory.
The self-test is performed.
Choose the option that gives the correct sequence of these tasks.
Answer: C. 5, 2, 4, 1, 3 — ConceptA bootstrap process begins with firmware checking the hardware, then finding and loading a small boot program. That boot program can then bring the…
- A.
5, 4, 2, 3, 1
- B.
2, 5, 3, 4, 1
- C.
5, 2, 4, 1, 3
- D.
2, 3, 5, 1, 4
- E.
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Correct answer: C
Concept
A bootstrap process begins with firmware checking the hardware, then finding and loading a small boot program. That boot program can then bring the remaining operating-system components into main memory.
Therefore, the sequence must follow the dependency chain: hardware check before boot-loader discovery, boot-loader discovery before loading it, and boot-loader execution before the rest of the operating system is brought into memory.
Application
Task 5 performs the self-test before software loading begins.
Task 2 identifies the small operating-system portion called the boot loader.
Task 4 loads that boot loader into main memory.
Task 1 then pulls in the rest of the operating system.
Task 3 stores that remaining operating-system content in main memory.
Cross-check
Each step now has its prerequisite immediately before it: the loader is found before it is loaded, and it is loaded before it can fetch and store the rest of the operating system.
Result
The required sequence is 5, 2, 4, 1, 3.