What will be the @arr value after executing: my @arr = grep { $_ > 0 } map { $_ * $_ } (1, -1, 2, -2);

What does chop do in PERL?

$@ is used in association with the ____ function.

What does unshift do?

All arguments to a subroutine are passed as:

What would be $x after my $x = '5' x '4';

What will be printed by the code below? my $val = {}; print ref($val);

What will be printed by the code below? my $val = bless {}, 'MyClass'; print ref($val);

The last and next statements are ideal for ............. that check for exceptional conditions?

Autoloading of Perl functions is analogous to dynamic loading of compiled ____ functions?

Which function returns true if the named key exists in a Hash?