Which default user interface environment is standard across Microsoft Windows operating systems? MCQ with Answer and Explanation

Question
Which default user interface environment is standard across Microsoft Windows operating systems?
A. Aqua User Interface
B. Bash CLI
C. GNOME Desktop
D. Explorer.exe (Windows Shell)
Answer: Option D
Solution (By JKSSB Mock Tests)
Explorer.exe provides the core Windows Graphical Shell user interface, including the desktop screen, taskbar, and file navigation.
This question belongs to: Computer Operating Systems
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Practice More Operating Systems Questions

Question #1
In Windows, the 'PowerShell' command to get a list of running processes is:
A. ps
B. Get-Process
C. All of the above
D. tasklist
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Correct Answer: Option C

Explanation:
Get-Process (PowerShell), ps (alias), and tasklist (CMD) all list processes.
This question belongs to: Computer Operating Systems
Question #2
In Android, which component is responsible for handling user input and events?
A. Window Manager
B. Activity Manager
C. View System
D. Sensor Manager
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Correct Answer: Option C

Explanation:
The View System includes UI widgets and handles input events like touches, key presses, and gestures.
This question belongs to: Computer Operating Systems
Question #3
Which of the following is a non-preemptive CPU scheduling algorithm?
A. Round Robin
B. First-Come, First-Served (FCFS)
C. Preemptive Priority
D. Shortest Remaining Time First
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Correct Answer: Option B

Explanation:
First-Come, First-Served is strictly non-preemptive; once a process obtains CPU execution rights, it keeps the processor until it terminates or blocks for input/output.
This question belongs to: Computer Operating Systems
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