Question

Which of the following option is used for checking if the file is readable or not?

(a) -r

(b) -f

(c) -n

(d) -z

This question was posed to me during an interview.

This interesting question is from Using test and [ ] to Evaluate Expressions in portion Essential Shell Programming of Unix

Answer 1

The correct choice is (a) -r

The best I can explain: To check if the file exists and is readable we can use -r option. The syntax is -r filename.