Which command is used to concatenate all files beginning with the string ’emp’ and followed by a non-numeric characters? A. cat emp[!0-9] B. more [emp][!0-9] C. cat emp[x-z] D. cat emp[a-z] E. None of the above

” option2=”more [emp][!0-9]” option3=”cat emp[x-z]” option4=”cat emp[a-z] E. None of the above” correct=”option1″]

The correct answer is: A. cat emp[!0-9]

The command cat is used to concatenate files.

The square brackets [ ] are used to specify a range of characters. The exclamation mark (!) is used to negate a range of characters. So, the command cat emp[!0-9] will concatenate all files beginning with the string ’emp’ and followed by a non-numeric character.

The command more is used to display a file one page at a time. The command emp[x-z] will display all files beginning with the string ’emp’ and followed by

a character in the range ‘x’ to ‘z’. The command emp[a-z] will display all files beginning with the string ’emp’ and followed by a character in the range ‘a’ to ‘z’.

The command cat emp[!0-9] is the only command that will concatenate all files beginning with the string ’emp’ and followed by a non-numeric character.