अपरेटिङ सिस्टम – Operating System MCQ
अपरेटिङ सिस्टम – कम्प्युटर र IT
Operating System · Computer & IT (Technical) · ४०९ प्रश्न
४०९ प्रश्न उपलब्ध। मोड छान्नुहोस्:
अपरेटिङ सिस्टम: प्रश्न र उत्तर
सही लागेको विकल्पमा थिच्नुहोस्। सही भए हरियो, गलत भए रातो देखिन्छ; ३ सेकेन्डपछि सही उत्तर र व्याख्या देखिन्छ।
सही: ० / ०
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Which UNIX inter-process communication mechanism provides a one-way byte stream, typically between a parent and its child process?
सही उत्तर: घ) Ordinary (anonymous) pipe
An ordinary pipe created with pipe() has a read end and a write end, and data flows in one direction only.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In Microsoft Windows, the shortcut Ctrl + Shift + Esc directly opens the:
सही उत्तर: ग) Task Manager
Ctrl + Shift + Esc opens Task Manager, where running processes and performance can be viewed and processes ended.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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GRUB, used on most Linux systems, is a:
सही उत्तर: ख) Boot loader
GRUB (GRand Unified Bootloader) loads the kernel at start-up and lets the user choose between installed operating systems.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which Linux file stores user account information such as the username, UID and home directory?
सही उत्तर: क) /etc/passwd
/etc/passwd has one line per account; encrypted passwords are kept separately in /etc/shadow.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In Linux, the first user-space process started by the kernel at boot, with PID 1, is:
सही उत्तर: घ) init (systemd in many modern distributions)
The kernel starts init (or systemd), which then starts all other services and is the ancestor of every user process.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which Linux command shows the used and available space on mounted file systems?
सही उत्तर: ग) df
df reports disk space per file system; du shows space used by files and directories, and free shows RAM usage.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In Linux, the command 'kill -9 1234' sends which signal to process 1234?
सही उत्तर: ख) SIGKILL
Signal 9 is SIGKILL, which terminates the process immediately and cannot be caught or ignored.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which Linux command searches files for lines that match a given pattern?
सही उत्तर: क) grep
grep prints lines matching a regular expression; find searches for files by name or attributes.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which Linux command changes the owner of a file?
सही उत्तर: घ) chown
chown changes the owner (and optionally the group); chmod changes permissions and chgrp changes only the group.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The Linux command 'chmod 640 report.txt' gives the group:
सही उत्तर: ग) Read permission only
In 640, the owner gets 6 (rw-), the group gets 4 (r--) and others get 0 (---).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
यी अभ्यास प्रश्न हुन्, आधिकारिक प्रश्न होइनन्। पाठ्यक्रम, विज्ञापन र नतिजाका लागि सम्बन्धित निकायको आधिकारिक वेबसाइट हेर्नुहोस्। उत्तरमा गल्ती भेटे प्रश्नमुनिको "टिप्पणी / गल्ती रिपोर्ट" मा लेख्नुहोस्।
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