Question

Unix / Linux

31.

Given the first two commands, what is the expected output for the third command? (single quotes)

$ echo *

a b c

$ x=*

$ echo '$x'

32.

Given the first two commands, what is the expected output for the third command? (Single quotes inside of double quotes)

$ echo *

a b c

$ x=*

$ echo "'$x'"

33.

Given the first two commands, what is the expected output for the third command? (double quotes inside of single quotes)

$ echo *

a b c

$ x=*

$ echo '"$x"'

34.

Given the first two commands, what is the expected output for the third command? (double quotes)

$ echo *

a b c

$ x=*

$ echo "$x"

35.

Given the first two commands, what is the expected output for the third command? (no quotes)

$ echo *

a b c

$ x=*

$ echo $x

Answer 1

31.

$ x=*

$ echo '$x'

OUTPUT: $x

whatever you write with in the single quotes, it is consider as a text to display. so the output is $x

32.

$ x=*

$ echo "'$x'"

OUTPUT: '*'

in double quotes, text and symbols are normally displayed but commands starts with $ are executed. here $ is a command used to display the variable value. here the variable is x. $x means * so, the value * is printed on the output screen. single quotes are normally displayed because they are not commands to execute.

33.

$ x=*

$ echo '"$x"'

OUTPUT: "$x"

In sigle quotes, every character and symbol is treated as text, they are not considered as commands. so everything written in single quotes is displayed on the output screen.

34.

$ x=*

$ echo "$x"

OUTPUT: *

Double quotes can execute the commands which are written inside it. here $x is a command. so it is executed and displayed the value of x to output console.

35.

$ x=*

$ echo $x

OUTPUT: *

you can display the variable value in unix without any quotes or by using double quotes. $x is a command to display the value of the x to output console. so * is printed on the output screen.