First of all I would like to welcome you to go4expert programming forum
  int i;
This will be infinite loop.

Originally Posted by SunilC
I guess it doesnt result in an Infinite loop but instead keeps on getting executed until the entire memory gets exhausted.. Could I please get a validation??
It will defintely result in an infinite loop for a simple reason that the variable being declared is removed from the memory when it goes out of scope and so this will not be what you are thinking.

Originally Posted by SunilC
Could i get to know what heap memory means??
A heap is a specialized tree-based data structure. Its base datatype (used for node keys) must be an ordered set.

Let A and B be nodes of a heap, such that B is a child of A. The heap must then satisfy the following condition (heap property):

key(A) ≥ key(B)

Does that refer to data segment? (if yes could i plz get to know how size of data segment is determined)??
Data segment is something related to compiler as far as I can think of and is not related to heap memory.