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BIOS and UEFI

Firmware interfaces for computers.

BIOS and UEFI are firmware interfaces responsible for initializing and managing a computer's hardware components, as well as configuring startup settings and booting into the operating system.
5 minutes 5 Questions

BIOS (Basic Input/Output System) and UEFI (Unified Extensible Firmware Interface) are both firmware interfaces that serve as the critical link between a computer's hardware and its operating system. BIOS is the traditional firmware interface that has been used since the 1980s. It initializes and t…

Concepts covered: CMOS and BIOS settings, Basic Input/Output System (BIOS), Unified Extensible Firmware Interface (UEFI), Secure Boot, BIOS vs UEFI, BIOS and UEFI Configuration, UEFI vs. Legacy BIOS, BIOS/UEFI password protection, POST (Power-On Self-Test), Legacy Boot, BIOS-based virtualization, BIOS/UEFI update process, BIOS and UEFI Updates, UEFI Variables, Boot Process

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CompTIA A+ - BIOS and UEFI Example Questions

Test your knowledge of BIOS and UEFI

Question 1

Which BIOS feature is used to configure the system's power management settings?

Correct Answer: ACPI (Advanced Configuration and Power Interface)

The correct answer is ACPI (Advanced Configuration and Power Interface). ACPI is the industry-standard power management feature used in modern computer systems. It provides an open standard for device configuration and power management by the operating system. ACPI allows the operating system to control the power state of hardware components, enabling more efficient power management. The other options are incorrect for the following reasons: PnP (Plug and Play) Configuration is related to the automatic detection and configuration of hardware devices, not specifically to power management. CPU Power Management is a subset of overall system power management and is typically controlled through ACPI. While it's related to power management, it's not the comprehensive BIOS feature for configuring system-wide power settings. APIC (Advanced Programmable Interrupt Controller) is responsible for managing hardware interrupts in a computer system. It's not directly related to power management settings.

Question 2

A user is experiencing issues with their PC after upgrading their RAM. What should the technician check first in BIOS settings?

Correct Answer: Verify that the RAM configuration is detected properly.

Verifying that the RAM configuration is detected properly ensures the new RAM upgrade is compatible and functioning as expected.

Question 3

An engineer installed a new ASIC on a laptop to improve graphics performance, but the laptop won't boot. Which step should be taken to solve this issue?

Correct Answer: Remove the ASIC and reset BIOS settings

The best solution to resolve the laptop not booting after installing a new ASIC to improve graphics performance is to remove the ASIC and reset the BIOS settings. Installing new hardware can sometimes cause conflicts or compatibility issues that prevent the system from booting properly. By removing the ASIC, you eliminate the potential source of the problem. Resetting the BIOS settings to their defaults ensures that any changes made to accommodate the new hardware are reverted, allowing the laptop to boot with its original configuration. The other options, such as removing the battery, reinstalling the OS, or replacing the power supply, do not address the root cause of the issue, which is the newly installed ASIC.

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