Validate Binary Search Tree | Check If a Binary Tree is BST or Not | Java

In this tutorial, I have explained multiple approaches to validate binary search tree LeetCode solution or check if a binary tree is BST or not.
How to check if a binary is tree is BST or not using Inorder traversal.
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Program to check if binary tree is a BST or not
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[@martintsvetkov2772]

Great explanation!

[@ProgrammingTutorials1M]

Thank you

[@dharmarajrathinavel]

Inserting : 10 0 70 13 56 as elements in BST,... Who is the parent of 56? A) 13 B) 70