Symmetric Tree

Question

Given the root of a tree, return whether the tree is symmetric.

Input: root = [1, 2, 2, 3, 4, 4, 3]

Output: True

Input: root = [1, 2, 2, 3, 4, 4, 4]

Output: False

Input: root = [1, 2, 2, 3, None, 3, None]

Output: False

What are some questions you'd ask an interviewer?

Which of these trees are NOT symmetric?

[1]

[5, 3, 3, 7, None, None, 7]

[3, 3, 3, None, 3, 3, None]

[5, 5, 5, 5, None, 5, None]