Question

A complete traversal of an n node binary tree is a(n)____ "operation if visiting a node is O(1)for the iterative implementation

A. O(1)

B.O(n)

C.O(logn)

D.O(n2)

Answer 1

B.O(n).

Step-by-step explanation:

Since the time complexity of visiting a node is O(1) in iterative implementation.So the time complexity of visiting every single node in binary tree is O(n).We can use level order traversal of a binary tree using a queue.Which can visit every node in O(n) time.Level order traversal do it in a single loop without doing any extra traversal.