Binary Tree Interview Questions

No. 01 - Binary Search Tree and Double-linked List
Convert a binary search tree to a sorted double-linked list. We can only change the target of pointers, but cannot create any new nodes.

No. 04 - Paths with Specified Sum in Binary Tree
All nodes along children pointers from root to leaf nodes form a path in a binary tree. Given a binary tree and a number, please print out all of paths where the sum of all nodes value is same as the given number.

No. 06 - Post-order Traversal Sequences of Binary Search Trees
Determine whether an input array is a post-order traversal sequence of a binary tree or not. If it is, return true; otherwise return false. Assume all numbers in an input array are unique.

No. 31 - Binary Search Tree Verification
How to verify whether a binary tree is a binary search tree?

No. 45 - Closest Node in a Binary Search Tree
Given a binary search tree and a value k, please find a node in the binary search tree whose value is closest to k.

Given a binary search tree, please check whether there are two nodes in it whose sum equals a given value.

19 comments:

  1. Replies
    1. Tks very much for your post.

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      Best rgs

      Delete
  2. which traversal is same in a binary tree and its mirror image

    ReplyDelete
  3. http://binarytreeinterview.blogspot.com/

    ReplyDelete
    Replies
    1. This blog is removed. can you share if you have saved the blog somewhere

      Delete
  4. This grouping of your BT problems is ridiculously helpful

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  6. Tks very much for your post.

    Avoid surprises — interviews need preparation. Some questions come up time and time again — usually about you, your experience and the job itself. We've gathered together the most common questions so you can get your preparation off to a flying start.

    You also find all interview questions at link at the end of this post.

    Source: Download Ebook: Ultimate Guide To Job Interview Questions Answers:

    Best rgs

    ReplyDelete
  7. public BSTNode toDoublyLinkedlIst() {

    BSTNodetest = inorder2(root);

    while (test != null ) {

    System.out.println(test.data);
    test = test.left;
    }
    return null;

    }

    public BSTNode inorder2(BSTNode node) {

    if (node.left == null && node.right == null) {

    return node;
    }

    BSTNode nodeLeft = inorder2(node.left);
    nodeLeft.right = node;

    BSTNode nodeRight = inorder2(node.right);
    nodeRight.left = node;

    return nodeRight;

    }

    ReplyDelete
  8. public BSTNode toDoublyLinkedlIst() {

    BSTNodetest = inorder2(root);

    while (test != null ) {

    System.out.println(test.data);
    test = test.left;
    }
    return null;

    }

    public BSTNode inorder2(BSTNode node) {

    if (node.left == null && node.right == null) {

    return node;
    }

    BSTNode nodeLeft = inorder2(node.left);
    nodeLeft.right = node;

    BSTNode nodeRight = inorder2(node.right);
    nodeRight.left = node;

    return nodeRight;

    }

    ReplyDelete
  9. Tks very much for your post.

    Avoid surprises — interviews need preparation. Some questions come up time and time again — usually about you, your experience and the job itself. We've gathered together the most common questions so you can get your preparation off to a flying start.

    You also find all interview questions at link at the end of this post.

    Source: Download Ebook: Ultimate Guide To Job Interview Questions Answers:

    Best rgs

    ReplyDelete
  10. There are so many programming language that require interview questions and answers for the people. Knowing the job interview question and answers enables you to give well thought out answers promptly to make yourself shine out from your competition.

    ReplyDelete
  11. Awesome. I am a beginner and this article helped me to resolve the problem .Thank you author and the whole expect team.


    http://www.wikitechy.com/view-article/simple-program-for-multiple-inheritance-using-cpp-with-example



    Both are really good,
    Cheers,
    Venkat

    ReplyDelete