A perl program file name prog.pl starts with the following line: #!/usr/bin/perl -w The file has execute permissions. What would be the difference between: (a) ./prog.pl (b) perl prog.pl

if $as==if $as=='x', then what is the output? print 'as'.'$as'.$as.''

How would I display an error during CGI application?

Perl stores numbers internally as:

1 $a='cat'; 2 $$acatches='rat'; Which is equivalent to second line.?

?!pattern means regular expression is:

Which operator performs exponential (power) calculation on operators?

What will be the value of $1 after execution of the code?

Which modifier can be used when matching in Perl to ignore case?

Perl 5 defines _____ special subroutines that are executed at specific times?

Which method pops off and returns the last value of the array?