In Perl, which of the following operators are used for determining the variable to which regex is applied?

In relation to Perl arrays, which is a special variable that is used for determining the index of the last element in an array?

The correct output of the Perl code snippet? package Exp1; our $exp2; $exp2 = 45; package Exp2; our $exp2 = 85; print $exp2; our $exp2; print $exp2;

Output of the Perl code snippet. $var = 'First Example'; $y = 48; $output = 12 + $y; print For variable $var' . ' we have, $var.\n';

In relation to Perl security mechanism, select, which of the statement is/are correct? i) Arguments to print are always checked for taintedness. ii) Hash keys are never tainted

In relation to tying arrays in Perl, which options are used for providing $#array and equivalent scalar(@array) access?

Which is not used to control scoping?

What function is used to check the length of a string?

our @ISA (person); What does @ISA mean?

How do I dereference a hash reference?

What option do I use to check the existence of a file?