If a tree node can have both a root node and leaf node, why? I understand that the root node is at Level 0 of the tree. I also understand that a leaf node is a tree node that has no children. So if a tree has a root node of A
and nothing else, would that root node A
also be considered a leaf node?
Is it possible for a tree node to be both a root node and leaf node?
From this Wikipedia link on Tree Data Structures, section Terminologies used in Trees:
So by definition, if a Tree structure only consists of a single Node, that single Node will in fact be both a Root and a Leaf. Read the link for further detail.
Now, whether your professor considers this to be correct is a whole 'nother story.
If a tree node can have both a root node and leaf node, why?
You answered your own question:
I understand that the root node is at Level 0 of the tree . I also understand that a leaf node is a tree node that has no children .
Here's a diagram for better understanding:
root
|
tree node
|
leaf node
So if a tree node had a root node of A and nothing else, would that be considered a leaf node also?
Refer to your definition directly above. Diagram for better understanding:
A - root node
|
tree node <-- tree node & leaf node
|
(null)
It is possible and how is it possible for a tree node to be both a root node and leaf node?
If you consider the root node to be a tree node, then a root node with no children will be both a tree node and leaf node.
If a tree node can have both a root node and leaf node, why
If a node is somewhere in between the root and a leaf, it has both a root node and a leaf under it.
how is it possible for a tree node to be both a root node and leaf node?
If the tree only consists of one node, that node is both the root and a leaf.
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