How do you delete a node from a binary search tree?

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Binary Tree Interview Questions

  1. [JUNIOR] What is a binary tree and what are its basic properties?
  2. [JUNIOR] What are pre-order, in-order, and post-order tree traversals?
  3. [JUNIOR] What is the difference between a binary tree and a binary search tree?
  4. [JUNIOR] How do you find the height or depth of a binary tree?
  5. [MID] How do you validate whether a binary tree is a valid binary search tree?
  6. [MID] How do you find the lowest common ancestor of two nodes in a binary tree?
  7. [JUNIOR] What are the different types of binary trees (full, complete, perfect, and balanced)?
  8. [JUNIOR] How do you insert a node into a binary search tree?
  9. [JUNIOR] How do you find the minimum and maximum elements in a binary search tree?
  10. [MID] How do you perform level-order (breadth-first) traversal of a binary tree?
  11. [MID] How do you find the diameter of a binary tree?
  12. [MID] How do you check if a binary tree is balanced?
  13. [MID] How do you find the kth smallest element in a binary search tree?
  14. [MID] How do you delete a node from a binary search tree?
  15. [SENIOR] How do you serialize and deserialize a binary tree?
  16. [SENIOR] How do you construct a binary tree from its preorder and inorder traversals?
  17. [SENIOR] How do you find the maximum path sum in a binary tree?
  18. [JUNIOR] How do you count the number of leaf nodes in a binary tree?
  19. [MID] How do you determine if a binary tree is symmetric (a mirror of itself)?
  20. [MID] How do you check if two binary trees are identical?
  21. [MID] How do you check if one binary tree is a subtree of another?
  22. [MID] How do you check if a root-to-leaf path with a given sum exists in a binary tree?
  23. [MID] How do you convert a sorted array into a balanced binary search tree?
  24. [MID] How do you find the inorder successor of a node in a BST?
  25. [MID] How do you perform inorder traversal of a binary tree without recursion?
  26. [SENIOR] How do you recover a BST where two nodes have been swapped by mistake?
  27. [JUNIOR] What is a binary heap and how does it relate to binary trees?
  28. [MID] How do you print the right side view of a binary tree?
  29. [MID] How do you perform zigzag (spiral) level-order traversal of a binary tree?
  30. [MID] How do you print all root-to-leaf paths in a binary tree?
  31. [MID] What is the difference between a balanced binary tree and a complete binary tree?
  32. [SENIOR] How do you convert a binary tree to a doubly linked list?
  33. [SENIOR] How do you find the largest BST subtree within a binary tree?
  34. [SENIOR] What is the boundary traversal of a binary tree and how do you implement it?
  35. [SENIOR] How do you find the maximum sum path between two leaf nodes in a binary tree?
  36. [SENIOR] How do you find all paths in a binary tree that sum to a given value (K-sum paths)?
  37. [SENIOR] How do you flatten a binary tree into a linked list?
  38. [EXPERT] What is an AVL tree and how does it maintain balance through rotations?
  39. [EXPERT] What is a Red-Black tree and what are its balancing properties?
  40. [JUNIOR] What is the maximum number of nodes at a given level L in a binary tree?
  41. [MID] How do you print the left view of a binary tree?
  42. [MID] How do you find all nodes at a given distance from a target node in a binary tree?
  43. [SENIOR] How do you print a binary tree in vertical order?
  44. [SENIOR] How do you connect nodes at the same level in a binary tree?
  45. [SENIOR] How do you merge two binary search trees into one?
  46. [SENIOR] How do you convert a sorted linked list to a balanced BST?
  47. [SENIOR] How do you count the number of nodes in a complete binary tree in better than O(n) time?
  48. [SENIOR] What are Morris traversal algorithms and how do they achieve O(1) space complexity?
  49. [EXPERT] How do AVL trees compare to Red-Black trees in terms of performance trade-offs?
  50. [EXPERT] What is the role of self-balancing trees in database indexing (B-trees, B+ trees)?
  51. [EXPERT] Why is a binary heap preferred over a BST for implementing a priority queue?
  52. [EXPERT] How do you clone a binary tree that contains random pointers?
  53. [EXPERT] How would you design a thread-safe binary search tree for concurrent access?
  54. [EXPERT] What are the implications of cache locality on binary tree performance compared to array-based structures?
  55. [EXPERT] How do treaps combine properties of binary search trees and heaps?