CSSLP · Question #157
CSSLP Question #157: Real Exam Question with Answer & Explanation
The correct answer is A: It provides a user interface for system's configuration.. During the Power-On Self-Test (POST), the BIOS performs critical duties including verifying its own code integrity, discovering and verifying system memory, identifying boot devices, providing a user interface for configuration, and delegating control to other BIOS modules.
Question
Which of the following are the principle duties performed by the BIOS during POST (power-on- self- test)? Each correct answer represents a part of the solution. Choose all that apply.
Options
- AIt provides a user interface for system's configuration.
- BIt identifies, organizes, and selects boot devices.
- CIt delegates control to other BIOS, if it is required.
- DIt discovers size and verifies system memory.
- EIt verifies the integrity of the BIOS code itself.
- FIt interrupts the execution of all running programs.
Explanation
During the Power-On Self-Test (POST), the BIOS performs critical duties including verifying its own code integrity, discovering and verifying system memory, identifying boot devices, providing a user interface for configuration, and delegating control to other BIOS modules.
Common mistakes.
- F. POST occurs before the operating system loads and any applications begin to run; therefore, the BIOS cannot "interrupt the execution of all running programs" because no programs are running yet.
Concept tested. BIOS POST duties
Reference. https://learn.microsoft.com/en-us/windows-hardware/drivers/bringup/boot-sequence-of-an-x86-based-pc
Topics
Community Discussion
No community discussion yet for this question.