220-801 · Question #206
Which of the following diagnostics is performed at POST?
The correct answer is A. RAM Self Check. The Power-On Self Test (POST) checks fundamental hardware including memory, CPU, and basic I/O before handing control to the operating system.
Question
Which of the following diagnostics is performed at POST?
Options
- ARAM Self Check
- BTemperature Check
- CHard Disk Parity Check
- DPlug and Play Compliance Check
How the community answered
(57 responses)- A95% (54)
- B4% (2)
- C2% (1)
Why each option
The Power-On Self Test (POST) checks fundamental hardware including memory, CPU, and basic I/O before handing control to the operating system.
RAM self-check is a core POST diagnostic - the BIOS/UEFI firmware tests each memory address for read/write integrity immediately after power-on to ensure the system has functioning memory before attempting to load the OS. A failure here results in beep codes or on-screen error messages.
Temperature monitoring is handled by hardware sensors and OS-level software after POST completes, not as a POST diagnostic step.
Hard disk parity or surface checks are OS-level or utility-level operations (such as chkdsk) and are not part of the POST sequence.
Plug and Play device enumeration occurs after POST during the OS boot process, not within the POST routine itself.
Concept tested: POST diagnostics and RAM self-check
Source: https://learn.microsoft.com/en-us/troubleshoot/windows-client/performance/windows-boot-issues-troubleshooting
Topics
Community Discussion
No community discussion yet for this question.