UNIX File Ownership and Permissions MCQs in OS

By: Prof. Dr. Fazal Rehman | Last updated: May 30, 2025

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1. The characters that specify the user and group category are





2. By chmod command multiple filenames are taken as the arguments.





3. To assign execute permission to the user for a file named file01.txt, the command we will use is





4. $ chmod ugo+w file01.txt — The given command assigns write permission to





5. To replace ‘ugo’ string in chmod command, which character do we use?





6. Which symbol is used with chmod to assign the permission to a file?





7. For removing write permission from the group and the others, the command used is





8. For changing the permissions of a file, the command used is





9. In how many ways can the chmod command be used?





10. How many components are contained in the expression used with chmod command for changing permissions in relative manner?





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