Like the others, I think some sample code would go a long way to explain what you are asking. At the moment, from your description, I am imaginging you mean code like what AnomalousMonk showed. If that is the case, then what you might be asking about is "fields" or "properties" of objects...? A global variable (or more specifically, a "package variable") defined with our is neither, it's simply one variable that has nothing to do with the object's fields, the variable will not normally be affected by object creation. If you're asking about how to define fields, then I can suggest the chapter Objects in Modern Perl (you might want to start with the section "Blessed References" to see how Perl's native OO support works, or maybe perlootut).

I don't understand the terminology you are using.

I have a perl package 'A' in which i have defined a variable in global section.

What is the "global section" of a Perl package?

... how many times will the variable in global section be redefined out of these 3 actions : object creation,function 1 call , function 2 call

I don't understand the word "redefined" in this context. Do you perhaps mean "accessed", either for read or write?

As already suggested, here's some code to perhaps provide a basis for discussion:

c:\@Work\Perl\monks>perl -wMstrict -le
"{ package A;
   our $count = 0;
   ;;
   sub new {
     my $class = shift;
     ++$count;
     return bless [ @_ ] => $class;
     }
   ;;
   sub ding { my $self = shift;  print 'ding';  return ++$count; }
   }
 ;;
 print 'count is: ', $A::count;
 ;;
 print 'create A object';
 my $oa = A->new('hi there');
 print 'count is: ', $A::count;
 ;;
 $oa->ding;
 print 'count is: ', $A::count;
 ;;
 $oa->ding;
 print 'count is: ', $A::count;
"
count is: 0
create A object
count is: 1
ding
count is: 2
ding
count is: 3
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