Question

Which one of the following command will be used for adding two spaces before every line in emp.lst?

(a) sed ‘s/^/    /’ emp.lst

(b) sed ‘s / /    /’emp.lst

(c) sed ‘s /$/   /’emp.lst

(d) sed ‘s/$/

I got this question in an interview.

Origin of the question is sed command in division Filters using Regular Expressions of Unix

Answer 1

Correct choice is (a) sed ‘s/^/    /’ emp.lst

Easy explanation: The ^ symbol is used for prefixing some value at the beginning of any line in the file.