Q. Which of the following files are known as special files in UNIX?

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Q. The size of /dev/null is always zero.

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Q. Which symbol is used to redirect error messages to /dev/null?

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Q. Which file is used for indicating terminals?

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Q. Which symbol is used to connect different streams?

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Q. Shell enables one or more arguments to be obtained from the standard output of another command. This feature is called _________

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Q. What will the result when we evaluate this statement?

$ directory=’pwd’=`pwd`

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Q. Which of the following is not a system defined variable?

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Q. Which of the following is an invalid variable?

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Q. Command substitution requires the command to use ________

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Q. The command is valid.

$ ls -lRa $HOME > home.ls

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Q. The UNIX shell is both _______ and _______ language.

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Q. Which of the following function(s) are performed by an interactive shell?

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Q. Every feature used in an interactive shell can also be used by a shell script.

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Q. Which one of the following is arguably the best shell to use?

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Q. Which one of the following command is used to create a child shell?

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Q. Shell variables are of ____ types.

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Q. Suppose ABD_DIR is a local variable. Then it will be accessible to the child process.

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Q. ____ command is used to display the environment variables only.

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Q. Which symbol is used for setting the PS1 prompt to show the current event number?

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