# Check if Binary Tree is a BST

- Common Interview Question
## Binary Search Tree (BST)

- A binary tree in which for each node, the value of all the nodes in left subtree is less (or equal) and value of all the nodes in the right subtree are greater.

- Common Interview Question
## Binary Search Tree (BST)

- A binary tree in which for each node, the value of all the nodes in left subtree is less (or equal) and value of all the nodes in the right subtree are greater.