Which command-line interface shortcut in Windows opens the Run dialog box directly? MCQ with Answer and Explanation

Question
Which command-line interface shortcut in Windows opens the Run dialog box directly?
A. Ctrl + Shift + Esc
B. Alt + F4
C. Windows Logo Key + E
D. Windows Logo Key + R
Answer: Option D
Solution (By JKSSB Mock Tests)
Pressing the Windows Key + R opens the 'Run' dialog box, allowing users to type and run programs, commands, or open folders instantly.
This question belongs to: Computer Operating Systems
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Question #1
Which of the following is a type of memory management scheme that uses fixed-size partitions?
A. Overlays
B. Paging
C. Segmentation
D. Swapping
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Correct Answer: Option B

Explanation:
Paging divides memory into fixed-size frames and processes into pages, reducing fragmentation; segmentation uses variable-sized segments.
This question belongs to: Computer Operating Systems
Question #2
Which command-line tool in Linux displays the current amount of free and used physical memory (RAM) and swap space within the system?
A. df
B. top -s
C. meminfo
D. free
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Correct Answer: Option D

Explanation:
The 'free' command parses system configuration details to quickly display total, used, and available physical memory along with swap parameters.
This question belongs to: Computer Operating Systems
Question #3
Which of the following is a technique used to reduce fragmentation in memory?
A. Segmentation
B. Paging
C. Compaction
D. Swapping
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Correct Answer: Option C

Explanation:
Compaction moves processes to create contiguous free space, reducing external fragmentation; paging eliminates external fragmentation.
This question belongs to: Computer Operating Systems
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