What do the @- and @+ arrays do?

What module is used to scrape contents from website?

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:

Perl supports _____ operations on integer scalar values?

Which statement is True of scalar context?

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?