How do I replace every TAB character in a file with a comma?

What is the following code output? (check all that apply)foreach my $operator ( qw(+ − * /) ) {    my $result = eval '2 $operator 2'; 

   print '2 $operator 2 is $result\n';

Which function renames an existing file?

What is the purpose of the -w switch in Perl?

Which operator can be used to take the bottom item from an array?

PERL Conditional Statements are:

A directory handle.

What does @ARGV refer to?

Which operator is associated with writing to a program?

Which can replace if else?

Which character is the variable designator for scalar variables?