When does the POST program run?

When does the POST program run?

• A. During shutdown
• B. After the operating system loads
• C. Every time the computer is booted
• D. Only when the BIOS is updated

Answer: (C)

The test is about when the startup self-check happens. Power-On Self-Test (POST) is executed by the firmware during the boot sequence, every time you start the computer or perform a reset. Its job is to verify that essential hardware—like memory, processor, and basic peripherals—is present and functioning enough to hand control over to the operating system. Because it occurs at every boot, not during shutdown, not after the OS is loaded, and not only when the BIOS is updated, this timing best matches “every time the computer is booted.” Some systems may do a quicker or partial POST for speed, but the check still happens with each startup.

The test is about when the startup self-check happens. Power-On Self-Test (POST) is executed by the firmware during the boot sequence, every time you start the computer or perform a reset. Its job is to verify that essential hardware—like memory, processor, and basic peripherals—is present and functioning enough to hand control over to the operating system. Because it occurs at every boot, not during shutdown, not after the OS is loaded, and not only when the BIOS is updated, this timing best matches “every time the computer is booted.” Some systems may do a quicker or partial POST for speed, but the check still happens with each startup.