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- There are nine nodes in the binary tree image above. The nine nodes are A, B,

C, D, E, F, G, H and I. Node A is at the top of the tree. There are two lines from - node A to the left and right sides towards nodes B and C, respectively. Let’s take a
- look at the left side of node A. There are also two lines from node B to the left and

right, leading to nodes D and E. Then from node E there is only one line which is to - to the left of the node and leads to node G. Similarly, the line from node C leads towards

ENG503 Midterm MCQs Solved

- node F on the right side of node C. Then two lines from node F lead

to nodes H and I on the left and right sides. - We now analyze this tree according to the mathematical definition of a binary tree.

Node A is the root of the tree. A tree structure (i.e. nodes B, D, E, G and - their relationship) on the left side of node A is a subtree called the Left Subtree.

ENG503 Midterm MCQs Solved

- Similarly, the nodes (C, F, H, and I) to the right of node A contain a subtree called the Right Subtree. This is how we created three parts of the tree. One part contains

only one node, i.e. A, while the other part has all the nodes on the left side of A, called as - Left subtree. Similarly, the third part is the right subtree containing the nodes on the right

side A. The following figure illustrates this scenario