What is the UID of the user root?

• A.1
• B.65536
• C.-1
• D.255
• E.0

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Most commands on Linux can display information on their usage. How can this information typically be displayed?

• A.By running the command with the option /? or /??.
• B.By running the command with the option ?! or ?=!.
• C.By running the command with the option -h or --help.
• D.By running the command with the option /doc or /documentation.
• E.By running the command with the option -m or --manpage.

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Which of the following permissions are set on the/tmp/directory?

• A.rwxrwxrwt
• B.rwSrw-rw-
• C.------rwX
• D.r-xr-X--t
• E.rwxrwS---

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What is the purpose of the PATH environment variable?

• A.It indicates the location of the default shell to be used when a user logs in.
• B.It specifies the location of a user's home directory.
• C.It increases security by preventing commands from running in certain locations.
• D.It contains the absolute path to the current directory.
• E.It allows the execution of commands without the need to know the location of the executable.

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Which of the following statements is true about Free Software?

• A.It must always be available free of charge.
• B.It only runs on Linux.
• C.It may be modified by anyone using it.
• D.It is only distributed as a compiled binary.
• E.It is developed by volunteers only.

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