Unix Questions and Answers – Changing File Ownership and Permissions – 1

This set of Unix Multiple Choice Questions & Answers (MCQs) focuses on “Changing File Ownership and Permissions – 1”.

1. Which command is used to change the permissions of a file?
a) chmod
b) ch
c) chown
d) chgrp
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2. chmod command can take multiple filenames as arguments.
a) True
b) False
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3. chmod command can be used in ____ ways.
a) 3
b) 2
c) 5
d) 0
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4. The expression used with chmod command to change permissions in a relative manner contains ____ components.
a) 5
b) 2
c) 4
d) 3
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5. Which of the following characters specify the user and group category?
a) ‘u’ and ‘g’
b) ‘g’ and ‘o’
c) ‘us’ and ‘gr’
d) ‘u’ and ‘o’
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6. Which of the following symbol is used with chmod to assign permission to a file?
a) –
b) /
c) +
d) *
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7. To assign execute permission to the user (owner) for a file named file01.txt, which of the following command will be used?
a) chmod u+r file01.txt
b) chmod u+w file01.txt
c) chmod u-x file01.txt
d) chmod u+x file01.txt
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 u    -  for specifying the category of user.
 +    - for assigning permission.
 x    - to specify execute permission.

8. What does the following command do?

     $ chmod ugo +w  file01.txt

a) assign write permission to users, group and others
b) assign write permission to the user (owner) only
c) assign write permission to group and others
d) command not executable
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9. Which character is used to replace ‘ugo’ string in chmod command?
a) a
b) v
c) x
d) o
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$ chmod a+w  file01		// assign write permission to user, group and others.

10. To remove write permission from group and others, which one of the following commands will be used?
a) chmod go+w file01
b) chmod go-w file01
c) chmod ug-w file01
d) chmod a-w file01
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Sanfoundry Global Education & Learning Series – Unix.

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