Check out the top trees and graphs data structure interview questions asked in interviews of top tech companies like Amazon, only on CodeStudio. Start Practicing now!

Problem Title

Difficulty

Avg Time to solve

Attempted

Flatten Binary Tree to Linked List

2

Moderate

25 mins

183

Number Of Ways For The Sum K

5

Hard

50 mins

31

Range Sum of BST

0

Easy

20 mins

27

BST to sorted DLL

7

Moderate

50 mins

71

Populating Next Right Pointers In Each Node

1

Moderate

25 mins

57

Merge Two Binary Trees

2

Easy

15 mins

27

Convert Sorted Array to BST

1

Easy

15 mins

71

Print Binary Tree

6

Moderate

30 mins

8

Minimum Cost Tree From Leaf Nodes

2

Hard

20 mins

25

Distributing Coins

1

Hard

45 mins

49

Maximum Binary Tree

0

Moderate

10 mins

18

Construct Binary Tree from Inorder and Postorder Traversal

6

Moderate

25 mins

94

Unique Binary Search Trees

1

Moderate

20 mins

40

Ninja And The Tree

2

Hard

45 mins

7

Populating Next Right Pointers in Each Node II

1

Moderate

20 mins

16

Number Of Good Leaf Nodes Pairs

3

Easy

15 mins

8

BALLOONS GAME

2

Easy

10 mins

55

Break The Tree

2

Moderate

30 mins

26

Insert Into A Binary Search Tree

4

Easy

20 mins

49

Create a binary tree from postorder and preorder traversal

5

Moderate

15 mins

27

Lowest Common Ancestor of a Binary Tree III

1

Moderate

25 mins

29

Delete Nodes And Return Forest

3

Moderate

20 mins

6

Equal Tree Partition

2

Moderate

15 mins

70

Amusement park

0

Moderate

35 mins

22

Check Whether Binary tree Is Complete

0

Moderate

25 mins

31

Flatten Binary Tree to Linked List

Moderate

2 upvotes

Number Of Ways For The Sum K

Hard

5 upvotes

Range Sum of BST

Easy

0 upvotes

BST to sorted DLL

Moderate

7 upvotes

Populating Next Right Pointers In Each Node

Moderate

1 upvote

Merge Two Binary Trees

Easy

2 upvotes

Convert Sorted Array to BST

Easy

1 upvote

Print Binary Tree

Moderate

6 upvotes

Minimum Cost Tree From Leaf Nodes

Hard

2 upvotes

Distributing Coins

Hard

1 upvote

Maximum Binary Tree

Moderate

0 upvotes

Construct Binary Tree from Inorder and Postorder Traversal

Moderate

6 upvotes

Unique Binary Search Trees

Moderate

1 upvote

Ninja And The Tree

Hard

2 upvotes

Populating Next Right Pointers in Each Node II

Moderate

1 upvote

Number Of Good Leaf Nodes Pairs

Easy

3 upvotes

BALLOONS GAME

Easy

2 upvotes

Break The Tree

Moderate

2 upvotes

Insert Into A Binary Search Tree

Easy

4 upvotes

Create a binary tree from postorder and preorder traversal

Moderate

5 upvotes

Lowest Common Ancestor of a Binary Tree III

Moderate

1 upvote

Delete Nodes And Return Forest

Moderate

3 upvotes

Equal Tree Partition

Moderate

2 upvotes

Amusement park

Moderate

0 upvotes

Check Whether Binary tree Is Complete

Moderate

0 upvotes

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