Label the Recursion Requirements. int fact (int n) { int result; } if(n==1) return 1; result = fact (n-1) return result; ni Show the Activation Stack for n = 4.

Q: convert the recursion code bellow to alterative using loop  public String noX(String str){  if…

A: The given recursion removes 'x' from the given string.

Q: Illustrate how an activation stack is used for the following recursive method for an input of 8.…

A: We have to Illustrate how an activation stack is used for the following recursive method for an…

Depth First Search

Depth-first search (DFS) also known as Depth First traversal is an algorithm used to traverse or search the nodes in a tree or graph data structure. Traversal usually means visiting all the nodes of a graph. DFS performs in a depth-ward manner. It uses a stack to remember the vertices it has visited. The search starts from the root node, where any arbitrary node is selected as a root node in a graph, and then each node is explored along each branch before performing backtracking. The DFS algorithm uses a recursive technique by following the idea of backtracking. DFS algorithm does this by performing an in-depth search of all the nodes by traversing in a forward direction. If the required node is not found, it starts backtracking to previously visited nodes.