Power-On Self-Test (POST) is performed by _____.
2024
Power-On Self-Test (POST) is performed by _____.
Answer: C. BIOS — ConceptWhen a computer is powered on, firmware executes before the operating system. It initializes essential hardware, checks basic components, and then…
- A.
Operating system
- B.
Assembler
- C.
BIOS
- D.
Linker
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Correct answer: C
Concept
When a computer is powered on, firmware executes before the operating system. It initializes essential hardware, checks basic components, and then transfers control to boot code.
Application
POST stands for Power-On Self-Test. It belongs to this firmware startup sequence, so the BIOS performs POST before the operating system is loaded.
Contrast
Operating system: manages system resources after the firmware stage hands over control.
Assembler: converts assembly-language instructions into object or machine code.
BIOS: is motherboard firmware that runs the startup hardware checks.
Linker: combines object files and libraries into an executable program.
Therefore, POST is performed by BIOS.