220-801 · Question #956
During a POST, which of the following is being checked? (Select TWO).
The correct answer is A. A count of available RAM B. The presence of a functioning CPU. POST (Power-On Self-Test) is firmware-level hardware diagnostics that run automatically when a computer is powered on. It verifies that essential hardware components are present and functional before the OS loads. This includes checking the CPU is present and operational, and…
Question
During a POST, which of the following is being checked? (Select TWO).
Options
- AA count of available RAM
- BThe presence of a functioning CPU
- CThe presence of unknown peripherals
- DIntegrity of system files
- ENetwork connectivity
How the community answered
(52 responses)- A88% (46)
- C2% (1)
- D2% (1)
- E8% (4)
Explanation
POST (Power-On Self-Test) is firmware-level hardware diagnostics that run automatically when a computer is powered on. It verifies that essential hardware components are present and functional before the OS loads. This includes checking the CPU is present and operational, and counting/verifying installed RAM. POST does not check for unknown peripherals, verify OS/system file integrity (that is the OS bootloader's job), or test network connectivity. POST failures are typically signaled via beep codes or on-screen error messages before the operating system begins to load.
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