Wednesday 5 April 2023

Why Linked List is implemented on Heap memory rather than Stack memory?

Linked lists are typically implemented on the heap memory rather than stack memory because the size of a linked list can vary dynamically, and the heap allows for dynamic memory allocation at runtime. In contrast, the stack is used for storing function calls and local variables, and its memory allocation is managed by the compiler at compile-time.

When a linked list is implemented on the heap, each node in the list is dynamically allocated at runtime using the malloc or new function. This allows the linked list to grow or shrink as needed without any restrictions on the maximum size of the list.

On the other hand, if a linked list were implemented on the stack, it would be limited by the maximum size of the stack, which is typically much smaller than the heap. Additionally, since the stack is managed automatically by the compiler, the memory allocated to a linked list on the stack would be deallocated automatically when the function that created the linked list returns, which would make it impossible to return the linked list from the function to the calling code.

Therefore, heap memory is the preferred choice for implementing linked lists because it provides flexibility and allows for dynamic memory allocation at runtime.

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