Homework Answers
Answer is as follows :
As we see x is global variable, so it is set as Program Stack initially. So Currently stack contains variable x.
Now we start from main function.
Two variables a1 and a2 are declare there. So memory is reserved for these two also.
Currently stack contains variable x , a1 , a2.
Than there is function call to method b().
Where at first int b is declared.
After that b is operated and variable c is declared and given a function call to method a().
So now stack contains variable x , a1 , a2 , b , c .
At method a() variable a is declared and return the value . So memory is also reserved for this.
So now stack contains variable x , a1 , a2 , b , c , a.
The compiler will not see variable d, so it can't get any memory in stack according to question. Only method a() is running so we can't proceed further to method b(), to initialize the memory to variable d.
So stack contains following variables :
x , a1 , a2 , b , c , a
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