when first time you allocate any size to *p, every next time you leave that memory to be unreferenced. That means
at a time your program is allocating memory of 4 bytes only
. then how can you thing you have used entire RAM, that's why SWAP device( temporary space on HDD) is out of discussion. I know an memory management algorithm in which when no one program is referencing to memory block, that block is eligible to allocate for programs memory request. That's why you are just keeping busy to RAM Driver and that's why it can't give chance to service other programs. Also this a dangling reference problem.
Ans : You can at most allocate the memory of your RAM size. Because no program has access to swap device.
I hope your all questions has got satisfactory answers.
