Which of the following files acts as the default boot loader for modern Windows systems utilizing UEFI firmware? MCQ with Answer and Explanation

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Which of the following files acts as the default boot loader for modern Windows systems utilizing UEFI firmware?

A. NTLDR

B. grub.efi

C. io.sys

D. bootmgr.efi

Answer: Option D

Solution (By JKSSB Mock Tests)

Modern Windows operating systems on UEFI systems use bootmgr.efi as the primary boot manager, whereas older BIOS-based legacy systems used NTLDR or bootmgr.

This question belongs to: Computer Operating Systems

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Question #1

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Which Windows keyboard shortcut instantly locks the active user account profile, requiring a password entry to log back in?

A. Windows Key + D

B. Windows Key + L

C. Ctrl + Alt + Delete

D. Alt + F4

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Correct Answer: Option B

Explanation:
Pressing Windows Key + L signals the desktop shell interface to lock the active session, securing user documents behind the login screen.

This question belongs to: Computer Operating Systems

Question #2

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Which administrative utility command in Windows allows a user to verify if system file variations have occurred and repair corrupted or missing core system files?

A. chkdsk /f

B. tasklist

C. sfc /scannow

D. ipconfig /all

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Correct Answer: Option C

Explanation:
The System File Checker (SFC) command utility ('sfc /scannow') scans protected Windows files for damage and replaces altered versions with accurate copies.

This question belongs to: Computer Operating Systems