23 Merge k Sorted Lists 23.3% Hard 165 Compare Version Numbers 17.4% Easy 195 Tenth Line 32.4% Easy 88 Merge Sorted Array 30.0% Easy 102 Binary Tree Level Order Traversal 32.7% Easy 251 Flatten 2D Vector 33.8% Medium 128 Longest Consecutive Sequence 32.1% Hard Sorry, your blog cannot share posts by email. 15 3Sum 18.8% Medium 218 The Skyline Problem 22.0% Hard 204 Count Primes 24.2% Easy Cisco. 297 Serialize and Deserialize Binary Tree 27.8% Hard 149 Max Points on a Line 14.2% Hard ", "Mostly coding interview questions. 26 Remove Duplicates from Sorted Array 33.4% Easy 103 Binary Tree Zigzag Level Order Traversal 28.6% Medium 8 String to Integer (atoi) 13.5% Easy 91 Decode Ways 17.5% Medium 42 Trapping Rain Water 32.2% Hard interviewers knew their stuff and questions were specific to the role I interviewed for. 323 Number of Connected Components in an Undirected Graph 42.8% Medium 160 Intersection of Two Linked Lists 30.2% Easy 213 House Robber II 30.5% Medium 139 Word Break 25.2% Medium Like anything else, it just takes practice. New Year Gift to every fellow time-constrained engineer out there looking for a job, here's a list of the best LeetCode questions that teach you core concepts and techniques for each category/type of problems! 282 Expression Add Operators 24.8% Hard 314 Binary Tree Vertical Order Traversal 30.3% Medium 150 Evaluate Reverse Polish Notation 23.5% Medium Deep Learning, 151 Reverse Words in a String 15.7% Medium 67 Add Binary 27.4% Easy 208 Implement Trie (Prefix Tree) 25.3% Medium Apple multimedia group: how to find and fix a bug when you program is frozen. 151 Reverse Words in a String 15.7% Medium 286 Walls and Gates 37.2% Medium 56 Merge Intervals 25.3% Hard The questions are standard -- you can find on topcoder, geeksforgeeks, and leetcode. , can you update this list please ? 71 Simplify Path 21.9% Medium 258 Add Digits 48.4% Easy 238 Product of Array Except Self 42.6% Medium 317 Shortest Distance from All Buildings 31.1% Hard 258 Add Digits 48.4% Easy 5 Longest Palindromic Substring 23.0% Medium 141 Linked List Cycle 37.0% Medium 238 Product of Array Except Self 42.6% Medium 63 Unique Paths II 29.3% Medium 302 Smallest Rectangle Enclosing Black Pixels 39.0% Hard 206 Reverse Linked List 39.4% Easy 246 Strobogrammatic Number 36.3% Easy 47 Permutations II 28.0% Medium 284 Peeking Iterator 33.5% Medium, Yahoo(11) 91 Decode Ways 17.5% Medium 53 Maximum Subarray 36.6% Medium 109 Convert Sorted List to Binary Search Tree 30.4% Medium 140 Word Break II 19.7% Hard No "reset password" flow. 126 Word Ladder II 13.6% Hard 56 Merge Intervals 25.3% Hard 327 Count of Range Sum 25.9% Hard 146 LRU Cache 15.8% Hard Microsoft(77) Apple, Go to company page Topics. 219 Contains Duplicate II 29.9% Easy 48 Rotate Image 34.6% Medium It's easy and quick. 23 Merge k Sorted Lists 23.3% Hard The team at Apple is diverse, with different specialties across different product groups. 79 Word Search 22.9% Medium 118 Pascal’s Triangle 33.3% Easy 7 Reverse Integer 23.6% Easy 1 Two Sum 23.0% Easy 1 Two Sum 23.0% Easy 42 Trapping Rain Water 32.2% Hard 44 Wildcard Matching 17.4% Hard 57 Insert Interval 23.8% Hard 262 Trips and Users 16.1% Hard 33 Search in Rotated Sorted Array 30.2% Hard Then kept asking about networking internals, file system internals, network packet details, protocol details. 312 Burst Balloons 36.4% Hard Go to company page 162 Find Peak Element 33.0% Medium 173 Binary Search Tree Iterator 34.5% Medium 289 Game of Life 34.2% Medium 168 Excel Sheet Column Title 21.6% Easy 257 Binary Tree Paths 28.4% Easy Data Mining, 78 Subsets 31.3% Medium 155 Min Stack 22.0% Easy LeetCode Explore is the best place for everyone to start practicing and learning on LeetCode. 117 Populating Next Right Pointers in Each Node II 32.8% Hard seemed more specific and hard to prepare for. 54 Spiral Matrix 22.5% Medium 170 Two Sum III – Data structure design 24.0% Easy 166 Fraction to Recurring Decimal 15.1% Medium 102 Binary Tree Level Order Traversal 32.7% Easy 48 Rotate Image 34.6% Medium 270 Closest Binary Search Tree Value 34.3% Easy 187 Repeated DNA Sequences 25.2% Medium 98 Validate Binary Search Tree 20.9% Medium 297 Serialize and Deserialize Binary Tree 27.8% Hard 311 Sparse Matrix Multiplication 47.2% Medium 209 Minimum Size Subarray Sum 26.8% Medium 238 Product of Array Except Self 42.6% Medium 21 Merge Two Sorted Lists 35.4% Easy 2 Add Two Numbers 23.0% Medium 309 Best Time to Buy and Sell Stock with Cooldown 36.6% Medium 23 Merge k Sorted Lists 23.3% Hard 98 Validate Binary Search Tree 20.9% Medium 219 Contains Duplicate II 29.9% Easy The interview staff were friendly, but the interview was by no means easy. Just the OAuth methods above. 124 Binary Tree Maximum Path Sum 23.3% Hard 138 Copy List with Random Pointer 26.1% Hard 236 Lowest Common Ancestor of a Binary Tree 28.8% Medium 127 Word Ladder 19.6% Medium 121 Best Time to Buy and Sell Stock 36.0% Easy 102 Binary Tree Level Order Traversal 32.7% Easy Data Science, 235 Lowest Common Ancestor of a Binary Search Tree 37.7% Easy 28 Implement strStr() 24.8% Easy 165 Compare Version Numbers 17.4% Easy Go to My Interview History. 251 Flatten 2D Vector 33.8% Medium We'll never post on your wall or message your friends. 235 Lowest Common Ancestor of a Binary Search Tree 37.7% Easy 200 Number of Islands 27.6% Medium 28 Implement strStr() 24.8% Easy 139 Word Break 25.2% Medium It lets us avoid storing passwords that hackers could access and use to try to log into our users' email or bank accounts. Go to company page 2 Add Two Numbers 23.0% Medium 3 Longest Substring Without Repeating Characters 21.9% Medium 280 Wiggle Sort 49.5% Medium