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Apple SDE 2

The 50 highest-frequency questions from last 6 months. Finish the strongest signals first.

One question at a time.

Top questions 50

Done	Question	LeetCode
Mark LRU Cache completed	LRU Cache	Solve
Mark Merge Intervals completed	Merge Intervals	Solve
Mark Design Hit Counter completed	Design Hit Counter	Solve
Mark Course Schedule II completed	Course Schedule II	Solve
Mark Group Anagrams completed	Group Anagrams	Solve
Mark Insert Delete GetRandom O(1) completed	Insert Delete GetRandom O(1)	Solve
Mark Number of Islands completed	Number of Islands	Solve
Mark Best Time to Buy and Sell Stock completed	Best Time to Buy and Sell Stock	Solve
Mark Reverse Linked List completed	Reverse Linked List	Solve
Mark Basic Calculator II completed	Basic Calculator II	Solve
Mark Longest Common Prefix completed	Longest Common Prefix	Solve
Mark Subarray Product Less Than K completed	Subarray Product Less Than K	Solve
Mark Subarray Sum Equals K completed	Subarray Sum Equals K	Solve
Mark Time Based Key-Value Store completed	Time Based Key-Value Store	Solve
Mark Two Sum completed	Two Sum	Solve
Mark 3Sum completed	3Sum	Solve
Mark Find First and Last Position of Element in Sorted Array completed	Find First and Last Position of Element in Sorted Array	Solve
Mark Best Time to Buy and Sell Stock II completed	Best Time to Buy and Sell Stock II	Solve
Mark Design Memory Allocator completed	Design Memory Allocator	Solve
Mark Edit Distance completed	Edit Distance	Solve
Mark Find All Lonely Numbers in the Array completed	Find All Lonely Numbers in the Array	Solve
Mark Longest Substring Without Repeating Characters completed	Longest Substring Without Repeating Characters	Solve
Mark Rotate Image completed	Rotate Image	Solve
Mark Serialize and Deserialize N-ary Tree completed	Serialize and Deserialize N-ary Tree	Solve
Mark Spiral Matrix completed	Spiral Matrix	Solve
Mark Task Scheduler completed	Task Scheduler	Solve
Mark Total Hamming Distance completed	Total Hamming Distance	Solve
Mark Valid Palindrome completed	Valid Palindrome	Solve
Mark Best Time to Buy and Sell Stock with Cooldown completed	Best Time to Buy and Sell Stock with Cooldown	Solve
Mark Course Schedule completed	Course Schedule	Solve
Mark Design Task Manager completed	Design Task Manager	Solve
Mark Is Graph Bipartite? completed	Is Graph Bipartite?	Solve
Mark Maximum Swap completed	Maximum Swap	Solve
Mark Meeting Rooms completed	Meeting Rooms	Solve
Mark Merge k Sorted Lists completed	Merge k Sorted Lists	Solve
Mark Reverse Integer completed	Reverse Integer	Solve
Mark Snapshot Array completed	Snapshot Array	Solve
Mark Word Ladder completed	Word Ladder	Solve
Mark All Nodes Distance K in Binary Tree completed	All Nodes Distance K in Binary Tree	Solve
Mark Best Time to Buy and Sell Stock with Transaction Fee completed	Best Time to Buy and Sell Stock with Transaction Fee	Solve
Mark Binary Tree Vertical Order Traversal completed	Binary Tree Vertical Order Traversal	Solve
Mark Cheapest Flights Within K Stops completed	Cheapest Flights Within K Stops	Solve
Mark Construct Binary Tree from Preorder and Postorder Traversal completed	Construct Binary Tree from Preorder and Postorder Traversal	Solve
Mark Convert Object to JSON String completed	Convert Object to JSON String	Solve
Mark Design Log Storage System completed	Design Log Storage System	Solve
Mark Find Median from Data Stream completed	Find Median from Data Stream	Solve
Mark Implement Trie (Prefix Tree) completed	Implement Trie (Prefix Tree)	Solve
Mark Keys and Rooms completed	Keys and Rooms	Solve
Mark Knight Probability in Chessboard completed	Knight Probability in Chessboard	Solve
Mark Letter Combinations of a Phone Number completed	Letter Combinations of a Phone Number	Solve

Showing the 50 highest-frequency questions from 69 reported in this period.