Showing a tree with only 2 branches on each node

1. Can a tree have two nodes?
2. Can binary tree have only left branches?
3. Can a node in the tree have more than two branches?
4. How many branches does a binary tree have?

Can a tree have two nodes?

In computer science, a 2–3 tree is a tree data structure, where every node with children (internal node) has either two children (2-node) and one data element or three children (3-nodes) and two data elements.

Can binary tree have only left branches?

In a word - yes.

Can a node in the tree have more than two branches?

The root of the tree is a type 2 node. There are no restrictions on the number of branches a node can have.

How many branches does a binary tree have?

Binary Trees are graphs or tree data structures where each node (shown as circles in the graph to the left) has up to a possible two branches ('children'). These are called the left branch and right branch, or, sometimes, the left child and right child.