## How do you delete data from a binary search tree?

Binary Search Tree | Set 2 (Delete)

- Node to be deleted is the leaf: Simply remove from the tree.
- Node to be deleted has only one child: Copy the child to the node and delete the child.
- Node to be deleted has two children: Find inorder successor of the node.

**What are the three cases for deleting a node in the BST?**

Here are the three cases that arise while performing a delete operation on a BST:

- Case 1: Node to be deleted is a leaf node. Directly delete the node from the tree.
- Case 2: Node to be deleted is an internal node with two children.
- Case 3: Node to be deleted is an internal node with one child.

### What is deletion operation in binary search tree?

delete operation is dropping the specified node from the tree. in case deleting the nodes, there are three possibilities − Deleting a leaf node from the tree: The simplest deletion is the deletion of a leaf node from the binary search tree. For deleting the leaf node only the leaf gets affected.

**How do you remove a node from a tree in Java?**

Case 3: Node to be deleted has two nodes.

- It is little complicated process.
- First find the node reference with given value.
- Find the minimum/maximum value of the right/left sub tree.
- Replace the node value with the minimum/maximum value.
- Now delete the minimum/maximum value from the nodes right/left sub tree.

#### What node is replaced when a deletion occur in heap?

Process of Deletion: Replace the root or element to be deleted by the last element. Delete the last element from the Heap. Since, the last element is now placed at the position of the root node.

**What’s the complexity of deletion in binary search tree?**

Deletion: For deletion of element 1, we have to traverse all elements to find 1 (in order 3, 2, 1). Therefore, deletion in binary tree has worst case complexity of O(n). In general, time complexity is O(h).

## Which node is replaced when a deletion occur in heap?

root node

Process of Deletion: Replace the root or element to be deleted by the last element. Delete the last element from the Heap. Since, the last element is now placed at the position of the root node.

**How do you remove tree nodes?**

Deletion in a Binary Tree

- Algorithm.
- Starting at the root, find the deepest and rightmost node in binary tree and node which we want to delete.
- Replace the deepest rightmost node’s data with the node to be deleted.
- Then delete the deepest rightmost node.