Why use postorder recursion?
Practice this question from Lowest Common Ancestor - Recursive split Pattern Practice Quiz, with options and an explanation.
Question
Why use postorder recursion?
Option A — Correct answer
The current node needs results from both subtrees
Option B
It sorts paths automatically
Option C
It avoids all stack space
Option D
It only works for arrays
Explanation
The current node must know what was found in both subtrees before deciding.