## How does rotation work in AVL tree?

## How does rotation work in AVL tree?

A single rotation applied when a node is inserted in the left subtree of a left subtree. In the given example, node C now has a balance factor of 2 after the insertion of node A. By rotating the tree right, node B becomes the root resulting in a balanced tree.

**What rotation is required to balance AVL?**

A double right rotation, or right-left rotation, or simply RL, is a rotation that must be performed when attempting to balance a tree which has a left subtree, that is right heavy. This is a mirror operation of what was illustrated in the section on Left-Right Rotations, or double left rotations.

### What is RR rotation in AVL tree?

If the node is inserted into the right of the right sub-tree of a node A and the tree becomes unbalanced then, in that case, RR rotation will be performed as shown in the following diagram. While the rotation, the node B becomes the root node of the tree.

**What are the major two types of rotations in AVL tree?**

The worst case space complexity is O(n) .

- AVL Insertion Process. Insertion in an AVL tree is similar to insertion in a binary search tree.
- Left Rotation (LL Rotation)
- Right Rotation (RR Rotation)
- Left-Right Rotation (LR Rotation)
- Right-Left Rotation (RL Rotation)

## Which rotation would be performed when node has balance factor?

Right – Right Rotation This type of rotation is identified when a node has a balanced factor as -2, and its right-child has a balance factor as -1.

**Which rotation is applicable in RR case?**

Right Rotation (RR Rotation) In right rotations, every node moves one position to right from the current position.

### What is data structure rotation?

A tree rotation is an operation on a binary tree that changes the structure without interfering with the order of the elements. A tree rotation moves one node up in the tree and one node down.

**What are the different rotations done in AVL tree?**

AVL Rotations

- Left rotation.
- Right rotation.
- Left-Right rotation.
- Right-Left rotation.