Question

The variable that returns code from operations that return true or false is _____________

(a) $rc

(b) $rv

(c) $rows

(d) $ary

I got this question in a national level competition.

I'd like to ask this question from General Preventative Maintenance topic in section Database Maintenance, Backups and Replication of MySQL

Answer 1

Correct answer is (a) $rc

The explanation is: 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.