8. What data structure would you mostly likely see in non recursive implementation of a recursive algorithm?a) Stackb) Linked Listc) Treed) Queue

The data structure you would most likely see in a non-recursive implementation of a recursive algorithm is a Stack.

Here's why:

1. Recursive algorithms often involve a function calling itself with modified arguments. Each of these function calls has its own set of local variables and arguments, which need to be stored somewhere while the function is running.

2. This is where the stack comes in. Each function call pushes a new frame onto the stack, which contains its local variables and arguments. When the function returns, its frame is popped from the stack, and control returns to the function whose frame is now on top of the stack.

3. This is exactly the behavior we need for implementing a recursive algorithm without actually using recursion: we can manually push and pop frames onto and off a stack.

4. The other data structures (Linked List, Tree, Queue) are not typically used for this purpose. A Linked List or Tree could potentially be used to store the stack, but this would be more complex and less efficient than using a dedicated stack data structure. A Queue is not suitable because it operates on a first-in-first-out basis, whereas a stack operates on a last-in-first-out basis, which is what we need for simulating recursion.

So, the answer is a) Stack.