What is the function of POST
Answers
Answer:
POST - Power On Self Test
Explanation:
A Power On Self Test is the first step of the boot sequence. It doesn't matter if you've just restarted your computer or if you've just powered it on for the first time in days; the POST is going to run, regardless.
POST doesn't rely on any specific operating system. In fact, there doesn't even need to be an OS installed on a hard drive for the POST to run. This is because the test is handled by the system's BIOS, not any installed software.
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.
The computer will continue to boot after the POST but only if it was successful. Problems can certainly appear after the POST, like Windows hanging during startup, but most of the time those can be attributed to an operating system or software problem, not a hardware one.
If the POST finds something wrong during its test, you'll usually get an error of some kind, and hopefully, one clear enough to help jump-start the troubleshooting process.
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