What is the primary purpose of POST (Power-On-Self- Test)?

Correct option is A

The Power-On-Self-Test (POST) is a diagnostic sequence that runs when a computer is powered on. It ensures all hardware components, such as RAM, CPU, and storage devices, are functioning correctly before loading the operating system.
Important Key Points:
1. Purpose: Checks and initializes hardware components to ensure they are error-free.
2. Error Indications: If an issue is detected, POST provides error codes or beep sounds.
3. Sequence: Runs before handing over control to the bootloader.
4. Importance: Prevents booting into an unstable or non-functional environment.
5. Modern Systems: BIOS or UEFI firmware performs the POST.
Knowledge Booster:
· BIOS vs. UEFI: UEFI is the modern replacement for BIOS, offering faster boot times and better hardware support.
· POST Errors: Common errors include RAM failures, missing boot devices, or GPU issues.
· Beep Codes: Indicate specific errors during POST; each motherboard manufacturer has unique codes.
· Next Step After POST: The bootloader is triggered, loading the operating system into memory.