How would you output the list of keys in a hash?

Does perl require variables be declared with a type? (ie: int, float, double, etc.)

$m=ucfirst('test'); What will be the output of $m?

lc function stands for?

You may force yourself to declare your variables by:

Which conditional statement is equivalent to 'if (!)'?

Which Perl debugger commands is used for deleting all post-prompt Perl command actions?

What will be the output of the following Perl program? if ('5678' =~ /(?5)(?6)(?7)(?8)/) {foreach my $b_name (sort keys %-) { my $array_n = $-{$b_name}; foreach my $i (0..$#$array_n) { print '\$-{$b_name}[$i] : ', (defined($array_n->[$i]) ? ' '$array_n->[$i]' ' : 'undef'), '\n'; } } }

What will be the output of the following Perl code snippet? @EXAMPLE = (' - ABC', '01 - FAS', '2 - FAP', ' - STTR'); foreach (@EXAMPLe){ if (/0/ .. /1/) { print '$_\n'; } }

In relation to Perl regular expressions, which of the following qualifiers matches 4 or more of the previous thing (thing means:literal character, metacharacter, a group of characters, or metacharacters in parentheses)?

Which Perl function is used for executing a little program in such a way that it traps any errors encountered so that the calling program does not crash?