Which Windows key combination opens the 'Run' dialog box? MCQ with Answer and Explanation

Question
Which Windows key combination opens the 'Run' dialog box?
A. Windows + R
B. Windows + E
C. Windows + D
D. Windows + L
Answer: Option A
Solution (By JKSSB Mock Tests)
Windows + R opens the Run dialog where commands can be entered; Windows+E opens File Explorer.
This question belongs to: Computer Operating Systems
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Practice More Operating Systems Questions

Question #1
What is the purpose of the Linux 'grep' command?
A. Move files
B. List directory contents
C. Copy files
D. Search for patterns in text
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Correct Answer: Option D

Explanation:
grep (global regular expression print) searches for lines matching a pattern in files or input.
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. free
D. meminfo
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Correct Answer: Option C

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 Windows diagnostic boot mode loads the operating system with a minimal set of core drivers and services to facilitate troubleshooting?
A. Safe Mode
B. Debugging Terminal
C. Recovery Console
D. Normal Mode
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Correct Answer: Option A

Explanation:
Safe Mode isolates operating system configuration bugs by loading only a minimal set of generic device drivers and structural services.
This question belongs to: Computer Operating Systems
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