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stack is also called LIFO i-e last in first out.the item stored at the end of the memory can be deleted first.or the item stored at the end of the memory can be accessed first.
if you are using c/c++, arguments to functions, local varaibles and return values use the stack.
A stack frame is created to keep track of it all during the function call.
The heap is a heap of available memory used when the program dynamically allocates memory with a call such as 'malloc' in C or 'new' in c++.
Memory management is the fact that you have to free the memory when you have finished with it with 'free' in C or 'delete' in C++.
Otherwise you run out of memory. Forgetting to free allocated memory is normally called a memory leak and usualy results in a program crash.
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