DE Shaw Topics for Interview Preparation

Last Updated : 23 Jul, 2025

Table of Content

Easy Level

  1. Level Order Tree Traversal
  2. Check if two trees are Mirror
  3. Level Order Tree Traversal
  4. Print all nodes that don't have sibling
  5. A Product Array Puzzle
  6. Copy set bits in a range
  7. Find the element that appears once in a sorted array
  8. Given a string, find its first non-repeating character
  9. Implement Stack using Queues
  10. Intersection of two Sorted Linked Lists
  11. Majority Element
  12. Median of two sorted arrays
  13. Print a given matrix in spiral form
  14. Implement Queue using Stacks
  15. Search an element in a sorted and rotated array
  16. Write a program function to detect loop in a linked list

Medium Level


  1. Count BST nodes that lie in a given range
  2. Dynamic Programming | Set 11 (Egg Dropping Puzzle)
  3. Find the number of islands | Set 1 (Using DFS)
  4. Find the largest BST subtree in a given Binary Tree | Set 1
  5. Program to find amount of water in a given glass
  6. Given a matrix of 'O' and 'X', find the largest subsquare surrounded by 'X'
  7. Largest Sum Contiguous Subarray
  8. Minimum Number of Platforms Required for a Railway/Bus Station
  9. Trie | (Insert and Search)
  10. Write a function to get the intersection point of two Linked Lists.


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