Q. ____ command displays all the variables available in the current shell.

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Q. Environment variable names can be defined only in uppercase.

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Q. The shell has ____ prompts.

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Q. Which one of the following command will change our primary prompt from $ to C> ?

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Q. Which environment variable is used to display our username?

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Q. Which one of the following is not an environment variable?

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Q. Which escape sequence is used with PS1 to show the hostname of our computer?

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Q. Which of the following shells support the use of aliases?

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Q. We can display an alias definition by using an alias with the name.

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Q. Which command is used in bash and Korn shells to display the previously used commands?

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Q. To display the last five used commands, which one of the following commands is used (in bash shell)?

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Q. Which of the following symbols are used for accessing previous commands by event numbers?

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Q. We can use relative addressing while executing previous commands.

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Q. We can also execute previous commands by context.

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Q. Which symbol is used as a shorthand for using the last argument to the previous command?

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Q. To reverse any setting updated by set command we can use ____ symbol.

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Q. The ____ acts as a shorthand representation of the home directory.

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Q. Every shell uses at least one startup script in the user’s home directory, which is executed when the user logs in.

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Q. Which file is executed every time a second shell is called up?

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Q. Which of the following are history variables?

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