Stack and heap

2. Disclaimer: This presentation is prepared by trainees of
baabtra as a part of mentoring program. This is not official
document of baabtra –Mentoring Partner
Baabtra-Mentoring Partner is the mentoring division of baabte System Technologies Pvt .
Ltd

3. Typing Speed
Week
Target Achieved
1
25
17

4. STACK & HEAP
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5. STACK
 The stack is a common data structure for representing things
 Need to maintained in a particular order
LIFO

6. STACK (contd..)
 Local variables are stored on the stack
 Stores temporary variables created by each function
 Often a function or method calls another function which in turn
calls another function etc

7. STACK (contd..)
 The stack has a fixed size
 Both stack and heap are store on the RAM
 If there is not enough space on the stack to handle the
memory being assigned to it, a stack overflow occurs

8. STACK (contd..)
Example For Stack overflow
#include <stdio.h>
int main()
{
int nStack[100000000];
return 0;
}

9. HEAP
 The heap is simply the memory used by programs to store
global variables
 Heap variables have no dependencies with each other and
can always be accessed randomly at any time
 Used for dynamic memory allocation

10. HEAP (contd..)
 It is a more free-floating region of memory (and is larger)
 To allocate memory  malloc() , calloc() or realloc()
 To deallocate memory  free() [Memory leak]
 Does not have size restrictions on variable size
 Heap memory is slightly slower to be read from and written to

11. STACK AND HEAP EXAMPLES
public void Method1()
{
int i=4;
int y=2;
class1 cls1 = new class1();
}

12. STACK AND HEAP EXAMPLES (contd..)

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