IBM coding interview questions

38 DSA problems tagged as asked at IBM, with statements, examples and constraints — practise free on CampusCode.

• 6. Find the Missing Number Easy Array
• 19. Best Time to Buy and Sell Stock Easy Array
• 20. Find the Pivot Index Easy Array
• 29. Height Checker Easy Array
• 41. Flipping an Image Easy Array
• 51. Minimum Value to Get Positive Step by Step Sum Easy Array
• 57. Sum of Absolute Differences in Sorted Array Easy Array
• 59. Find the Array Concatenation Value Easy Array
• 66. Rotate Image (90 Degrees) Medium Array
• 70. Merge Intervals Medium Array
• 98. Longest Mountain in Array Medium Array
• 108. Jump Game II Medium Array
• 126. Jump Game II (Minimum Jumps) Hard Array
• 162. Roman to Integer Easy String
• 165. Valid Parentheses (String Version) Easy String
• 169. Merge Strings Alternately Easy String
• 190. Longest Substring Without Repeating Characters (Brute) Easy String
• 202. Integer to Roman Easy String
• 210. Longest Substring Without Repeating Characters Medium String
• 211. Longest Palindromic Substring Medium String
• 214. Minimum Window Substring Medium String
• 225. Valid Palindrome II Medium String
• 227. Reorganize String (Feasibility) Medium String
• 242. Sort Characters By Frequency Medium String
• 249. Minimum Add to Make Parentheses Valid Medium String
• 260. Longest Valid Parentheses Hard String
• 275. Last Substring in Lexicographical Order Hard String
• 387. Middle of the Linked List Medium Linked List
• 484. Find the Smallest Divisor Given a Threshold Medium Binary Search
• 509. Maximum Value at a Given Index in a Bounded Array Medium Binary Search
• 575. Valid Parentheses (Multiple Types) Easy Stack
• 613. Asteroid Collision Medium Stack
• 616. Online Stock Span Medium Stack
• 618. Exclusive Time of Functions Medium Stack
• 635. Minimum Add to Make Parentheses Valid Medium Stack
• 637. Longest Valid Parentheses Medium Stack
• 648. Removing Stars From a String Medium Stack
• 1306. Missing Number in Array (XOR Approach) Easy Bit Manipulation