Which of the following is a security feature in Windows that prevents unauthorized code from running? MCQ with Answer and Explanation

Question
Which of the following is a security feature in Windows that prevents unauthorized code from running?
A. User Account Control (UAC)
B. Windows Firewall
C. BitLocker
D. Windows Defender
Answer: Option A
Solution (By JKSSB Mock Tests)
UAC prompts users for permission when programs try to make system changes, preventing unauthorized actions.
This question belongs to: Computer Operating Systems
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Practice More Operating Systems Questions

Question #1
Which component is responsible for loading the initial parts of the operating system kernel into memory during a cold boot?
A. Text Editor
B. Compiler
C. Bootloader
D. Defragmenter
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Correct Answer: Option C

Explanation:
The bootloader is a small program stored in non-volatile memory or boot sectors that locates, initializes, and loads the OS kernel into RAM.
This question belongs to: Computer Operating Systems
Question #2
What is the purpose of the Android 'WallpaperService'?
A. To draw wallpapers
B. To manage wallpapers
C. To create live wallpapers that run as a service
D. To set wallpapers
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Correct Answer: Option C

Explanation:
WallpaperService is the base class for live wallpapers, enabling animations and interactive backgrounds.
This question belongs to: Computer Operating Systems
Question #3
What is the default command prompt interpreter application executable file in modern Windows?
A. bash.exe
B. cmd.exe
C. command.com
D. terminal.sys
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Correct Answer: Option B

Explanation:
The default command prompt interpreter application file for modern Windows systems is 'cmd.exe'.
This question belongs to: Computer Operating Systems
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