Question

Which variable returns code from operations that return true or false?

(a) $rc

(b) $rv

(c) $rows

(d) $ary

I got this question by my school teacher while I was bunking the class.

This intriguing question originated from Perl DBI Overview in section MySQL Programs Using Perl DBI and PHP of MySQL

Answer 1

Right answer is (a) $rc

Explanation: The Perl Non-handle variable ‘$rc’ returns code from operations that return true or false. ‘$rv’ returns value from operations that return an integer. ‘$rows’ returns value from operations that return a row count.