QUESTION 3 The following will never return a syntax error from test: [ -f $FILEN

Question

QUESTION 3

The following will never return a syntax error from test:

[ -f $FILENAME ]

True

False

10 points   

QUESTION 4

PATH is the environment variable which represents your search path. The shell looks along PATH to find where an executable file is located as it tries to execute a command from the command line. If there is dot (.) on your PATH, the shell will look in the current directory for the command. The shell searches PATH from left to right. It is a colon separated list.

If there is a : at the beginning of PATH, that is an implied dot (.) --> same as .:

If there is a : at the end of PATH, that is an implied dot same as :.

If there is a :: in the PATH, that is the an implied dot same as :.:

I want you to match the case statement pattern to the correct description.

:*|.:*)

*:|*:.)

*::*|*:.:*)

There is a . at the begining of the PATH

There is a . at the end of the PATH

There is a dot somewhere in the middle of my PATH

30 points   

QUESTION 5

In the case statement, you don't need to use quoting to protect the characters from interpretation from the shell.

True

False

10 points   

QUESTION 6

The case statement can not be used to do string comparision

True

False

6 points   

QUESTION 7

In the case statement match pattern and description.

*)

?)

[chars])

[!chars])

matches any character not in the character set

matches zero or more characters

matches any single character

matches any character in the character set

28 points   

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      -       A.       B.       C.   

:*|.:*)

      -       A.       B.       C.   

*:|*:.)

      -       A.       B.       C.   

*::*|*:.:*)

A.

There is a . at the begining of the PATH

B.

There is a . at the end of the PATH

C.

There is a dot somewhere in the middle of my PATH

Explanation / Answer

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QUESTION 3

The following will never return a syntax error from test:

[ -f $FILENAME ]

True

False

Answer)

True

The test command is used for conditional execution os shell command.

The syntax is

test EXPRESSION

or

[ EXPRESSION ]

EXPRESSION will be the [ -f $FILENAME ] which is valid where $FILENAME will be replaced by the FILENAME.

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