220-1102 Operating Systems Practice Question
A technician needs to configure a Windows 10 computer to boot from a USB drive to run a diagnostic tool. Which key is typically pressed during POST to access the boot menu?
⚠ Common exam trap
Test-takers frequently confuse the key used to enter BIOS/UEFI setup (often F1 or F2) with the key used to access the one-time boot menu (typically F12), leading them to select an incorrect option.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
F12
The F12 key is the standard key used by most PC manufacturers to access the boot menu during POST, allowing the technician to select a USB drive as the boot device without changing the permanent boot order in BIOS/UEFI. This is the correct choice for booting from a USB drive to run a diagnostic tool.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
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F1
Why it's wrong here
The F1 key is traditionally assigned to entering the BIOS help screen or, on some laptops, the system setup utility. It is rarely mapped to the one-time boot menu by any major OEM (Dell, HP, Lenovo), so pressing it during POST will either show help text or open firmware settings, forcing you to exit and reboot. It is not the correct key to select a USB boot device.
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F2
Why it's wrong here
The F2 key is a widely used shortcut for entering the BIOS or UEFI firmware setup on systems from Dell, Lenovo, and Acer. While you could permanently change the boot order via the Boot tab in this configuration screen, that is not the same as invoking a temporary boot menu. Using F2 requires navigating to the Boot section, modifying the sequence, saving, and restarting—an inefficient and potentially hazardous approach for a one-time USB boot.
- ✓
F12
Why this is correct
The F12 key is the standard key on most Dell, HP, and many other systems to open the one-time boot menu (also called the Boot Device Menu or Boot Override). This menu displays all connected bootable devices, allowing you to select the USB drive without permanently altering the firmware settings. It is the quickest and safest method to boot from USB for a technician, as the selection applies only to the current boot.
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Delete
Why it's wrong here
The Delete key is commonly assigned to entering the BIOS/UEFI setup on desktop motherboards from ASUS, MSI, and Gigabyte. It does not invoke a boot menu; instead, it loads the full firmware configuration interface. Even on motherboards with a boot override feature, that function is typically bound to a different key (like F8 or F11), so Delete is not the correct choice for a one-time USB boot.
Go deeper
Related to this question
Learn chapter
Windows Device Manager
Key term
Universal Serial Bus
A Universal Serial Bus (USB) is a standard interface that allows you to connect devices like keyboards, mice, storage drives, and printers to a computer for data transfer and power delivery.
Key term
Windows
Windows is a family of operating systems developed by Microsoft that manages computer hardware and software, providing a graphical user interface for users to interact with their devices.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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