When a computer is switched on, it performs a set of diagnostic tests to see if the hardware is working properly. This process is referred to as ______.

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ALP CBT 2 Electronic Mechanic Previous Paper: Held on 21 Jan 2019 Shift 1

Answer 1

Power On Self Test:

A power-on self-test (POST) is a process performed by firmware or software routines immediately after a computer or another digital electronic device is powered on.
It is the initial set of diagnostic tests performed by the computer right after it's powered on, with the intent to check for any hardware related issues.
The computer verifies the hardware whether working properly or not.
A Power On Self Test is the first step of the boot sequence.
POST doesn't rely on any specific operating system.
There doesn't even need to be an OS installed on a hard drive for the POST to run.
A Power On Self Test checks that basic system devices are present and working properly, like the keyboard and other peripheral devices, and other hardware elements like the processor, storage devices, and memory.