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Question #1
A tree is a linear data structure.
Question #2
Data in the tree is ordered by a key value.
Question #3
If the nodes attached to a tree are in ascending or descending order, the result is a linked list
rather than a tree.
Question #4
The node's child is the node above it to which it is linked.
Question #5
A subtree can be any node with branches extending below it.