Question

There is a tree with three nodes where the nodes are numbered from 0 to tree_nodes - 1. What is the number of nodes in the tree?

1) 2
2) 3
3) 4
4) 5

Answer 1

The tree has three nodes, numbered 0, 1, and 2, hence the number of nodes in the tree is 3.

Step-by-step explanation:

The student has asked about the number of nodes in a tree with three nodes, numbered from 0 to tree_nodes - 1. The number of nodes in the tree is simply the count of these nodes. Since we are starting to count from 0, and go up to tree_nodes - 1 for a tree with three nodes, we have nodes numbered as 0, 1, and 2. This means there are three nodes in total because the numbering starts from 0 and not 1.