Binary Search Tree (BST) Interview Questions

A Binary Search Tree (BST) is a rooted binary tree, whose nodes each store a key (and optionally, an associated value) and each have two distinguished sub-trees, commonly denoted left and right. The tree should satisfy the BST property, which states that the key in each node must be greater than all keys stored in the left sub-tree, and not greater than all keys in the right sub-tree. Ideally, only unique values should be present in the tree.

They are a fundamental data structure used to construct more abstract data structures such as sets, multisets, and associative arrays (maps, multimaps, etc).

Below is the list of commonly asked binary search tree interview questions –

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