Explain the concept of AVL tree?

An AVL tree is a self-balancing binary search tree in which there is a maximum height difference of 1 between each node's left and right subtrees. This attribute is obtained by rotating the tree when nodes are added or removed, which helps to keep the tree balanced. The Adelson-Velsky and Landis (AVL) trees are named after their designers. Many different applications, including databases, file systems, and other data structures, utilise AVL trees. Because the height of an AVL tree is always O(log n), where n is the number of nodes in the tree, these trees are often referred to as height-balanced trees. This makes search, insert, and delete operations efficient. These interview questions on data structure are very helpful in your preparation.