What are the most frequent LeetCode questions for Apple?

The top problems asked in Apple technical interviews include LRU Cache, Two Sum, Merge Intervals. In total, 310 verified problems are tracked across Easy (78), Medium (185), and Hard (47) tiers.

Where can I find company-wise LeetCode questions for Apple?

LeetMap Pro provides a complete, verified list of 310 company-wise Apple coding interview questions filtered by 30-day, 3-month, and 6-month recency windows, 100% free with no paywall or subscription.

How does LeetMap track Apple interview problem recency?

LeetMap weights problem occurrences across 30-day, 3-month, and 6-month recency windows to ensure candidates focus on problems actively being asked in the current hiring cycle.

What difficulty distribution should I expect in Apple coding rounds?

For Apple, Medium difficulty problems represent the largest share (185 problems), followed by Easy (78) and Hard (47). Mastering foundational patterns like Trees, Graphs, and Dynamic Programming is essential.

AppleLeetCode Questions

Verified

310 questions·78 Easy·185 Medium·47 Hard

Company-wise coding interview questions asked by Apple, ranked by real frequency across 30-day, 3-month, and 6-month recency windows.

SQL (1)

⌘K

#146LRU Cache

Medium·Freq 100%·Acc 47.6%

#1Two Sum

Easy·Freq 88%·Acc 57.8%

#56Merge Intervals

Medium·Freq 88%·Acc 52.3%

#200Number of Islands

Medium·Freq 88%·Acc 64.7%

#121Best Time to Buy and Sell Stock

Easy·Freq 79%·Acc 57.0%

#362Design Hit Counter

Medium·Freq 79%·Acc 69.7%

#189Rotate Array

Medium·Freq 78%·Acc 45.2%

#49Group Anagrams

Medium·Freq 78%·Acc 72.9%

#347Top K Frequent Elements

Medium·Freq 77%·Acc 66.8%

#14Longest Common Prefix

Easy·Freq 76%·Acc 47.9%

#36Valid Sudoku

Medium·Freq 76%·Acc 64.7%

#206Reverse Linked List

Easy·Freq 76%·Acc 80.8%

#210Course Schedule II

Medium·Freq 75%·Acc 55.9%

#207Course Schedule

Medium·Freq 75%·Acc 51.8%

#20Valid Parentheses

Easy·Freq 75%·Acc 44.5%

#125Valid Palindrome

Easy·Freq 75%·Acc 53.7%

#238Product of Array Except Self

Medium·Freq 75%·Acc 69.1%

#151Reverse Words in a String

Medium·Freq 75%·Acc 57.0%

#215Kth Largest Element in an Array

Medium·Freq 75%·Acc 69.1%

#3Longest Substring Without Repeating Characters

Medium·Freq 75%·Acc 39.4%

#48Rotate Image

Medium·Freq 75%·Acc 80.4%

#53Maximum Subarray

Medium·Freq 68%·Acc 53.5%

#54Spiral Matrix

Medium·Freq 68%·Acc 57.2%

#981Time Based Key-Value Store

Medium·Freq 68%·Acc 50.0%

#23Merge k Sorted Lists

Hard·Freq 67%·Acc 60.0%

#7Reverse Integer

Medium·Freq 66%·Acc 32.1%

#122Best Time to Buy and Sell Stock II

Medium·Freq 66%·Acc 71.3%

#713Subarray Product Less Than K

Medium·Freq 65%·Acc 54.7%

#4Median of Two Sorted Arrays

Hard·Freq 64%·Acc 47.0%

#34Find First and Last Position of Element in Sorted Array

Medium·Freq 64%·Acc 49.3%

#42Trapping Rain Water

Hard·Freq 64%·Acc 67.7%

#253Meeting Rooms II

Medium·Freq 64%·Acc 52.7%

#560Subarray Sum Equals K

Medium·Freq 64%·Acc 47.7%

#190Reverse Bits

Easy·Freq 63%·Acc 68.8%

#236Lowest Common Ancestor of a Binary Tree

Medium·Freq 63%·Acc 69.7%

#283Move Zeroes

Easy·Freq 63%·Acc 64.1%

#380Insert Delete GetRandom O(1)

Medium·Freq 63%·Acc 55.4%

#622Design Circular Queue

Medium·Freq 63%·Acc 55.0%

#21Merge Two Sorted Lists

Easy·Freq 63%·Acc 68.5%

#1146Snapshot Array

Medium·Freq 63%·Acc 36.8%

#127Word Ladder

Hard·Freq 63%·Acc 46.0%

#155Min Stack

Medium·Freq 63%·Acc 58.4%

#227Basic Calculator II

Medium·Freq 63%·Acc 47.0%

#295Find Median from Data Stream

Hard·Freq 63%·Acc 54.7%

#88Merge Sorted Array

Easy·Freq 63%·Acc 55.2%

#139Word Break

Medium·Freq 63%·Acc 49.6%

#153Sum

Medium·Freq 63%·Acc 39.4%

#70Climbing Stairs

Easy·Freq 63%·Acc 54.2%

#240Search a 2D Matrix II

Medium·Freq 63%·Acc 57.6%

#348Design Tic-Tac-Toe

Medium·Freq 63%·Acc 58.8%

#28Find the Index of the First Occurrence in a String

Easy·Freq 63%·Acc 46.9%

#165Compare Version Numbers

Medium·Freq 63%·Acc 46.7%

#191Number of 1 Bits

Easy·Freq 63%·Acc 77.1%

#208Implement Trie (Prefix Tree)

Medium·Freq 63%·Acc 69.7%

#284Peeking Iterator

Medium·Freq 63%·Acc 61.7%

#383Ransom Note

Easy·Freq 63%·Acc 66.2%

#443String Compression

Medium·Freq 63%·Acc 60.3%

#102Binary Tree Level Order Traversal

Medium·Freq 63%·Acc 73.0%

#118Pascal's Triangle

Easy·Freq 63%·Acc 79.1%

#714Best Time to Buy and Sell Stock with Transaction Fee

Medium·Freq 55%·Acc 72.3%

#10Regular Expression Matching

Hard·Freq 53%·Acc 31.2%

#26Remove Duplicates from Sorted Array

Easy·Freq 53%·Acc 63.2%

#128Longest Consecutive Sequence

Medium·Freq 53%·Acc 47.2%

#387First Unique Character in a String

Easy·Freq 53%·Acc 65.8%

#706Design HashMap

Easy·Freq 53%·Acc 66.7%

#3522Calculate Score After Performing Instructions

Medium·Freq 53%·Acc 57.2%

#1606Find Servers That Handled Most Number of Requests

Hard·Freq 53%·Acc 45.6%

#5Longest Palindromic Substring

Medium·Freq 51%·Acc 38.2%

#19Remove Nth Node From End of List

Medium·Freq 51%·Acc 52.0%

#69Sqrt(x)

Easy·Freq 51%·Acc 42.1%

#149Max Points on a Line

Hard·Freq 51%·Acc 31.0%

#237Delete Node in a Linked List

Medium·Freq 51%·Acc 84.1%

#297Serialize and Deserialize Binary Tree

Hard·Freq 51%·Acc 61.1%

#341Flatten Nested List Iterator

Medium·Freq 51%·Acc 65.8%

#565Array Nesting

Medium·Freq 51%·Acc 56.7%

#996Number of Squareful Arrays

Hard·Freq 51%·Acc 51.6%

#17Letter Combinations of a Phone Number

Medium·Freq 50%·Acc 66.4%

#33Search in Rotated Sorted Array

Medium·Freq 50%·Acc 45.2%

#104Maximum Depth of Binary Tree

Easy·Freq 50%·Acc 78.4%

#221Maximal Square

Medium·Freq 50%·Acc 50.6%

#232Implement Queue using Stacks

Easy·Freq 50%·Acc 70.1%

#257Binary Tree Paths

Easy·Freq 50%·Acc 69.0%

#394Decode String

Medium·Freq 50%·Acc 62.9%

#621Task Scheduler

Medium·Freq 50%·Acc 63.4%

#1047Remove All Adjacent Duplicates In String

Easy·Freq 50%·Acc 73.6%

#2023Number of Pairs of Strings With Concatenation Equal to Target

Medium·Freq 50%·Acc 75.5%

#2397Maximum Rows Covered by Columns

Medium·Freq 50%·Acc 58.2%

#2972Count the Number of Incremovable Subarrays II

Hard·Freq 50%·Acc 40.5%

#2970Count the Number of Incremovable Subarrays I

Easy·Freq 50%·Acc 56.8%

#3030Find the Grid of Region Average

Medium·Freq 50%·Acc 43.8%

#11Container With Most Water

Medium·Freq 50%·Acc 60.4%

#22Generate Parentheses

Medium·Freq 50%·Acc 78.9%

#55Jump Game

Medium·Freq 50%·Acc 41.2%

#167Two Sum II - Input Array Is Sorted

Medium·Freq 50%·Acc 65.4%

#252Meeting Rooms

Easy·Freq 50%·Acc 59.5%

#273Integer to English Words

Hard·Freq 50%·Acc 35.1%

#658Find K Closest Elements

Medium·Freq 50%·Acc 49.9%

#733Flood Fill

Easy·Freq 50%·Acc 68.6%

#509Fibonacci Number

Easy·Freq 50%·Acc 74.3%

#1275Find Winner on a Tic Tac Toe Game

Easy·Freq 50%·Acc 54.7%

#68Text Justification

Hard·Freq 50%·Acc 51.5%

#344Reverse String

Easy·Freq 50%·Acc 81.0%

#460LFU Cache

Hard·Freq 49%·Acc 49.7%

#8String to Integer (atoi)

Medium·Freq 43%·Acc 21.3%

#46Permutations

Medium·Freq 43%·Acc 82.1%

#57Insert Interval

Medium·Freq 43%·Acc 45.5%

#239Sliding Window Maximum

Hard·Freq 43%·Acc 49.0%

#322Coin Change

Medium·Freq 43%·Acc 48.7%

#1650Lowest Common Ancestor of a Binary Tree III

Medium·Freq 43%·Acc 83.0%

#2150Find All Lonely Numbers in the Array

Medium·Freq 43%·Acc 63.6%

#2502Design Memory Allocator

Medium·Freq 43%·Acc 50.4%

#2Add Two Numbers

Medium·Freq 39%·Acc 48.8%

#13Roman to Integer

Easy·Freq 39%·Acc 66.8%

#73Set Matrix Zeroes

Medium·Freq 39%·Acc 63.3%

#79Word Search

Medium·Freq 39%·Acc 47.7%

#134Gas Station

Medium·Freq 39%·Acc 48.3%

#162Find Peak Element

Medium·Freq 39%·Acc 47.1%

#242Valid Anagram

Easy·Freq 39%·Acc 68.3%

#787Cheapest Flights Within K Stops

Medium·Freq 39%·Acc 42.2%

#876Middle of the Linked List

Easy·Freq 39%·Acc 82.1%

#994Rotting Oranges

Medium·Freq 39%·Acc 59.0%

#895Maximum Frequency Stack

Hard·Freq 39%·Acc 66.9%

#855Exam Room

Medium·Freq 39%·Acc 43.6%

#2591Distribute Money to Maximum Children

Easy·Freq 39%·Acc 20.6%

#841Keys and Rooms

Medium·Freq 39%·Acc 76.0%

#112Path Sum

Easy·Freq 39%·Acc 55.3%

#309Best Time to Buy and Sell Stock with Cooldown

Medium·Freq 39%·Acc 62.4%

#477Total Hamming Distance

Medium·Freq 39%·Acc 55.1%

#428Serialize and Deserialize N-ary Tree

Hard·Freq 39%·Acc 68.9%

#72Edit Distance

Medium·Freq 39%·Acc 60.9%

#39Combination Sum

Medium·Freq 38%·Acc 76.8%

#75Sort Colors

Medium·Freq 38%·Acc 70.0%

#97Interleaving String

Medium·Freq 38%·Acc 44.3%

#123Best Time to Buy and Sell Stock III

Hard·Freq 38%·Acc 54.2%

#143Reorder List

Medium·Freq 38%·Acc 65.7%

#202Happy Number

Easy·Freq 38%·Acc 59.9%

#268Missing Number

Easy·Freq 38%·Acc 72.3%

#274H-Index

Medium·Freq 38%·Acc 41.6%

#328Odd Even Linked List

Medium·Freq 38%·Acc 62.6%

#378Kth Smallest Element in a Sorted Matrix

Medium·Freq 38%·Acc 64.8%

#412Fizz Buzz

Easy·Freq 38%·Acc 75.7%

#468Validate IP Address

Medium·Freq 38%·Acc 28.4%

#647Palindromic Substrings

Medium·Freq 38%·Acc 73.0%

#1011Capacity To Ship Packages Within D Days

Medium·Freq 38%·Acc 74.3%

#688Knight Probability in Chessboard

Medium·Freq 38%·Acc 57.2%

#269Alien Dictionary

Hard·Freq 38%·Acc 37.3%

#635Design Log Storage System

Medium·Freq 38%·Acc 59.6%

#211Design Add and Search Words Data Structure

Medium·Freq 38%·Acc 48.7%

#2065Maximum Path Quality of a Graph

Hard·Freq 38%·Acc 62.6%

#108Convert Sorted Array to Binary Search Tree

Easy·Freq 38%·Acc 75.8%

#1087Brace Expansion

Medium·Freq 38%·Acc 66.9%

#188Best Time to Buy and Sell Stock IV

Hard·Freq 38%·Acc 50.7%

#198House Robber

Medium·Freq 38%·Acc 53.4%

#314Binary Tree Vertical Order Traversal

Medium·Freq 38%·Acc 57.9%

#3074Apple Redistribution into Boxes

Easy·Freq 38%·Acc 78.6%

#71Simplify Path

Medium·Freq 38%·Acc 50.9%

#92Reverse Linked List II

Medium·Freq 38%·Acc 51.9%

#124Binary Tree Maximum Path Sum

Hard·Freq 38%·Acc 42.5%

#332Reconstruct Itinerary

Hard·Freq 35%·Acc 44.7%

#126Word Ladder II

Hard·Freq 35%·Acc 27.8%

#329Longest Increasing Path in a Matrix

Hard·Freq 35%·Acc 56.8%

#184Sum

Medium·Freq 30%·Acc 41.1%

#27Remove Element

Easy·Freq 30%·Acc 62.1%

#45Jump Game II

Medium·Freq 30%·Acc 43.1%

#47Permutations II

Medium·Freq 30%·Acc 63.7%

#74Search a 2D Matrix

Medium·Freq 30%·Acc 54.3%

#98Validate Binary Search Tree

Medium·Freq 30%·Acc 36.0%

#100Same Tree

Easy·Freq 30%·Acc 67.5%

#150Evaluate Reverse Polish Notation

Medium·Freq 30%·Acc 58.2%

#153Find Minimum in Rotated Sorted Array

Medium·Freq 30%·Acc 55.0%

#160Intersection of Two Linked Lists

Easy·Freq 30%·Acc 64.2%

#217Contains Duplicate

Easy·Freq 30%·Acc 64.5%

#224Basic Calculator

Hard·Freq 30%·Acc 47.0%

#349Intersection of Two Arrays

Easy·Freq 30%·Acc 78.0%

#438Find All Anagrams in a String

Medium·Freq 30%·Acc 54.1%

#463Island Perimeter

Easy·Freq 30%·Acc 74.5%

#503Next Greater Element II

Medium·Freq 30%·Acc 68.7%

#515Find Largest Value in Each Tree Row

Medium·Freq 30%·Acc 66.3%

#523Continuous Subarray Sum

Medium·Freq 30%·Acc 31.5%

#628Maximum Product of Three Numbers

Easy·Freq 30%·Acc 46.1%

#692Top K Frequent Words

Medium·Freq 30%·Acc 60.4%

#528Random Pick with Weight

Medium·Freq 30%·Acc 49.2%

#907Sum of Subarray Minimums

Medium·Freq 30%·Acc 38.8%

#973K Closest Points to Origin

Medium·Freq 30%·Acc 69.2%

#759Employee Free Time

Hard·Freq 30%·Acc 73.0%

#1041Robot Bounded In Circle

Medium·Freq 30%·Acc 56.6%

#2347Best Poker Hand

Easy·Freq 30%·Acc 61.9%

#359Logger Rate Limiter

Easy·Freq 30%·Acc 76.9%

#1197Minimum Knight Moves

Medium·Freq 30%·Acc 42.0%

#340Longest Substring with At Most K Distinct Characters

Medium·Freq 30%·Acc 50.1%

#724Find Pivot Index

Easy·Freq 30%·Acc 63.2%

#1472Design Browser History

Medium·Freq 30%·Acc 78.4%

#158Read N Characters Given read4 II - Call Multiple Times

Hard·Freq 30%·Acc 43.3%

#199Binary Tree Right Side View

Medium·Freq 30%·Acc 70.7%

#820Short Encoding of Words

Medium·Freq 30%·Acc 60.9%

#243Shortest Word Distance

Easy·Freq 30%·Acc 66.4%

#37Sudoku Solver

Hard·Freq 30%·Acc 65.6%

#731My Calendar II

Medium·Freq 30%·Acc 63.3%

#986Interval List Intersections

Medium·Freq 30%·Acc 73.1%

#1091Shortest Path in Binary Matrix

Medium·Freq 30%·Acc 51.8%

#2435Paths in Matrix Whose Sum Is Divisible by K

Hard·Freq 30%·Acc 58.7%

#277Find the Celebrity

Medium·Freq 30%·Acc 49.0%

#212Word Search II

Hard·Freq 30%·Acc 38.6%

#736Parse Lisp Expression

Hard·Freq 30%·Acc 53.8%

#678Valid Parenthesis String

Medium·Freq 30%·Acc 40.3%

#3408Design Task Manager

Medium·Freq 30%·Acc 48.9%

#670Maximum Swap

Medium·Freq 30%·Acc 52.1%

#785Is Graph Bipartite?

Medium·Freq 30%·Acc 59.6%

#6Zigzag Conversion

Medium·Freq 25%·Acc 54.5%

#25Reverse Nodes in k-Group

Hard·Freq 25%·Acc 66.6%

#41First Missing Positive

Hard·Freq 25%·Acc 43.2%

#76Minimum Window Substring

Hard·Freq 25%·Acc 47.9%

#84Largest Rectangle in Histogram

Hard·Freq 25%·Acc 50.3%

#101Symmetric Tree

Easy·Freq 25%·Acc 61.6%

#176Second Highest SalarySQL

Medium·Freq 25%·Acc 47.5%

#203Remove Linked List Elements

Easy·Freq 25%·Acc 54.9%

#204Count Primes

Medium·Freq 25%·Acc 36.2%

#218The Skyline Problem

Hard·Freq 25%·Acc 45.6%

#219Contains Duplicate II

Easy·Freq 25%·Acc 51.5%

#225Implement Stack using Queues

Easy·Freq 25%·Acc 70.4%

#278First Bad Version

Easy·Freq 25%·Acc 47.3%

#345Reverse Vowels of a String

Easy·Freq 25%·Acc 61.7%

#355Design Twitter

Medium·Freq 25%·Acc 45.1%

#424Longest Repeating Character Replacement

Medium·Freq 25%·Acc 60.1%

#493Reverse Pairs

Hard·Freq 25%·Acc 34.7%

#54201 Matrix

Medium·Freq 25%·Acc 54.4%

#543Diameter of Binary Tree

Easy·Freq 25%·Acc 65.8%

#605Can Place Flowers

Easy·Freq 25%·Acc 29.2%

#680Valid Palindrome II

Easy·Freq 25%·Acc 44.5%

#839Similar String Groups

Hard·Freq 25%·Acc 56.4%

#849Maximize Distance to Closest Person

Medium·Freq 25%·Acc 49.9%

#909Snakes and Ladders

Medium·Freq 25%·Acc 48.2%

#953Verifying an Alien Dictionary

Easy·Freq 25%·Acc 56.0%

#1249Minimum Remove to Make Valid Parentheses

Medium·Freq 25%·Acc 71.5%

#1352Product of the Last K Numbers

Medium·Freq 25%·Acc 63.0%

#1570Dot Product of Two Sparse Vectors

Medium·Freq 25%·Acc 89.9%

#1657Determine if Two Strings Are Close

Medium·Freq 25%·Acc 54.4%

#2104Sum of Subarray Ranges

Medium·Freq 25%·Acc 61.5%

#2351First Letter to Appear Twice

Easy·Freq 25%·Acc 75.1%

#317Shortest Distance from All Buildings

Hard·Freq 25%·Acc 45.0%

#1242Web Crawler Multithreaded

Medium·Freq 25%·Acc 51.3%

#769Max Chunks To Make Sorted

Medium·Freq 25%·Acc 64.2%

#3163String Compression III

Medium·Freq 25%·Acc 67.1%

#103Binary Tree Zigzag Level Order Traversal

Medium·Freq 25%·Acc 64.1%

#2788Split Strings by Separator

Easy·Freq 25%·Acc 76.4%

#824Goat Latin

Easy·Freq 25%·Acc 70.1%

#843Guess the Word

Hard·Freq 25%·Acc 36.7%

#480Sliding Window Median

Hard·Freq 25%·Acc 39.0%

#661Image Smoother

Easy·Freq 25%·Acc 69.4%

#133Clone Graph

Medium·Freq 25%·Acc 65.7%

#874Walking Robot Simulation

Medium·Freq 25%·Acc 64.6%

#1213Intersection of Three Sorted Arrays

Easy·Freq 25%·Acc 80.0%

#157Read N Characters Given Read4

Easy·Freq 25%·Acc 42.6%

#1168Optimize Water Distribution in a Village

Hard·Freq 25%·Acc 65.6%

#1143Longest Common Subsequence

Medium·Freq 25%·Acc 59.3%

#3613Minimize Maximum Component Cost

Medium·Freq 25%·Acc 43.7%

#30Substring with Concatenation of All Words

Hard·Freq 25%·Acc 34.7%

#173Binary Search Tree Iterator

Medium·Freq 25%·Acc 76.7%

#1870Minimum Speed to Arrive on Time

Medium·Freq 25%·Acc 48.0%

#109Convert Sorted List to Binary Search Tree

Medium·Freq 25%·Acc 66.9%

#1854Maximum Population Year

Easy·Freq 25%·Acc 64.3%

#338Counting Bits

Easy·Freq 25%·Acc 80.7%

#737Sentence Similarity II

Medium·Freq 25%·Acc 51.4%

#707Design Linked List

Medium·Freq 25%·Acc 30.5%

#535Encode and Decode TinyURL

Medium·Freq 25%·Acc 86.7%

#365Water and Jug Problem

Medium·Freq 25%·Acc 45.9%

#209Minimum Size Subarray Sum

Medium·Freq 25%·Acc 52.2%

#435Non-overlapping Intervals

Medium·Freq 25%·Acc 57.4%

#490The Maze

Medium·Freq 25%·Acc 60.5%

#933Number of Recent Calls

Easy·Freq 25%·Acc 78.7%

#399Evaluate Division

Medium·Freq 25%·Acc 64.4%

#455Assign Cookies

Easy·Freq 25%·Acc 55.3%

#1229Meeting Scheduler

Medium·Freq 25%·Acc 55.2%

#695Max Area of Island

Medium·Freq 25%·Acc 74.1%

#161One Edit Distance

Medium·Freq 25%·Acc 34.6%

#636Exclusive Time of Functions

Medium·Freq 25%·Acc 66.3%

#931Minimum Falling Path Sum

Medium·Freq 25%·Acc 60.9%

#567Permutation in String

Medium·Freq 25%·Acc 49.2%

#918Maximum Sum Circular Subarray

Medium·Freq 25%·Acc 50.7%

#82Remove Duplicates from Sorted List II

Medium·Freq 25%·Acc 52.1%

#889Construct Binary Tree from Preorder and Postorder Traversal

Medium·Freq 25%·Acc 78.1%

#2633Convert Object to JSON String

Medium·Freq 25%·Acc 78.1%

#346Moving Average from Data Stream

Easy·Freq 25%·Acc 80.2%

#863All Nodes Distance K in Binary Tree

Medium·Freq 25%·Acc 67.8%

#432All O`one Data Structure

Hard·Freq 25%·Acc 44.4%

#1392Longest Happy Prefix

Hard·Freq 25%·Acc 53.6%

#110Balanced Binary Tree

Easy·Freq 25%·Acc 58.7%

#1740Find Distance in a Binary Tree

Medium·Freq 25%·Acc 74.4%

#875Koko Eating Bananas

Medium·Freq 25%·Acc 50.2%

#496Next Greater Element I

Easy·Freq 25%·Acc 76.5%

#729My Calendar I

Medium·Freq 25%·Acc 58.3%

#67Add Binary

Easy·Freq 25%·Acc 58.3%

#90Subsets II

Medium·Freq 25%·Acc 61.6%

#91Decode Ways

Medium·Freq 25%·Acc 38.2%

#138Copy List with Random Pointer

Medium·Freq 25%·Acc 63.3%

#213House Robber II

Medium·Freq 25%·Acc 45.2%

#235Lowest Common Ancestor of a Binary Search Tree

Medium·Freq 25%·Acc 70.9%

#485Max Consecutive Ones

Easy·Freq 25%·Acc 65.6%

#867Transpose Matrix

Easy·Freq 25%·Acc 76.7%

#885Spiral Matrix III

Medium·Freq 25%·Acc 84.6%

#291Word Pattern II

Medium·Freq 25%·Acc 49.0%

#912Sort an Array

Medium·Freq 25%·Acc 55.9%

#3019Number of Changing Keys

Easy·Freq 25%·Acc 80.8%

#704Binary Search

Easy·Freq 22%·Acc 0.6%

#772Basic Calculator III

Hard·Freq 22%·Acc 0.5%

#684Redundant Connection

Medium·Freq 22%·Acc 0.7%

#417Pacific Atlantic Water Flow

Medium·Freq 22%·Acc 0.6%

#416Partition Equal Subset Sum

Medium·Freq 22%·Acc 0.5%

#1117Building H2O

Medium·Freq 22%·Acc 0.6%

#59Spiral Matrix II

Medium·Freq 22%·Acc 0.8%

#	Problem	Difficulty	Frequency↓	Acceptance
#146	LRU Cache3 sources	Medium	100%	47.6%
#1	Two Sum3 sources	Easy	88%	57.8%
#56	Merge Intervals3 sources	Medium	88%	52.3%
#200	Number of Islands3 sources	Medium	88%	64.7%
#121	Best Time to Buy and Sell Stock3 sources	Easy	79%	57.0%
#362	Design Hit Counter3 sources	Medium	79%	69.7%
#189	Rotate Array3 sources	Medium	78%	45.2%
#49	Group Anagrams3 sources	Medium	78%	72.9%
#347	Top K Frequent Elements3 sources	Medium	77%	66.8%
#14	Longest Common Prefix3 sources	Easy	76%	47.9%
#36	Valid Sudoku3 sources	Medium	76%	64.7%
#206	Reverse Linked List3 sources	Easy	76%	80.8%
#210	Course Schedule II3 sources	Medium	75%	55.9%
#207	Course Schedule3 sources	Medium	75%	51.8%
#20	Valid Parentheses3 sources	Easy	75%	44.5%
#125	Valid Palindrome3 sources	Easy	75%	53.7%
#238	Product of Array Except Self3 sources	Medium	75%	69.1%
#151	Reverse Words in a String3 sources	Medium	75%	57.0%
#215	Kth Largest Element in an Array3 sources	Medium	75%	69.1%
#3	Longest Substring Without Repeating Characters3 sources	Medium	75%	39.4%
#48	Rotate Image3 sources	Medium	75%	80.4%
#53	Maximum Subarray3 sources	Medium	68%	53.5%
#54	Spiral Matrix3 sources	Medium	68%	57.2%
#981	Time Based Key-Value Store3 sources	Medium	68%	50.0%
#23	Merge k Sorted Lists3 sources	Hard	67%	60.0%
#7	Reverse Integer3 sources	Medium	66%	32.1%
#122	Best Time to Buy and Sell Stock II3 sources	Medium	66%	71.3%
#713	Subarray Product Less Than K3 sources	Medium	65%	54.7%
#4	Median of Two Sorted Arrays3 sources	Hard	64%	47.0%
#34	Find First and Last Position of Element in Sorted Array3 sources	Medium	64%	49.3%
#42	Trapping Rain Water3 sources	Hard	64%	67.7%
#253	Meeting Rooms II3 sources	Medium	64%	52.7%
#560	Subarray Sum Equals K3 sources	Medium	64%	47.7%
#190	Reverse Bits3 sources	Easy	63%	68.8%
#236	Lowest Common Ancestor of a Binary Tree3 sources	Medium	63%	69.7%
#283	Move Zeroes3 sources	Easy	63%	64.1%
#380	Insert Delete GetRandom O(1)3 sources	Medium	63%	55.4%
#622	Design Circular Queue3 sources	Medium	63%	55.0%
#21	Merge Two Sorted Lists3 sources	Easy	63%	68.5%
#1146	Snapshot Array3 sources	Medium	63%	36.8%
#127	Word Ladder3 sources	Hard	63%	46.0%
#155	Min Stack3 sources	Medium	63%	58.4%
#227	Basic Calculator II3 sources	Medium	63%	47.0%
#295	Find Median from Data Stream3 sources	Hard	63%	54.7%
#88	Merge Sorted Array3 sources	Easy	63%	55.2%
#139	Word Break3 sources	Medium	63%	49.6%
#15	3Sum3 sources	Medium	63%	39.4%
#70	Climbing Stairs3 sources	Easy	63%	54.2%
#240	Search a 2D Matrix II3 sources	Medium	63%	57.6%
#348	Design Tic-Tac-Toe3 sources	Medium	63%	58.8%
#28	Find the Index of the First Occurrence in a String3 sources	Easy	63%	46.9%
#165	Compare Version Numbers3 sources	Medium	63%	46.7%
#191	Number of 1 Bits3 sources	Easy	63%	77.1%
#208	Implement Trie (Prefix Tree)3 sources	Medium	63%	69.7%
#284	Peeking Iterator3 sources	Medium	63%	61.7%
#383	Ransom Note3 sources	Easy	63%	66.2%
#443	String Compression3 sources	Medium	63%	60.3%
#102	Binary Tree Level Order Traversal3 sources	Medium	63%	73.0%
#118	Pascal's Triangle3 sources	Easy	63%	79.1%
#714	Best Time to Buy and Sell Stock with Transaction Fee3 sources	Medium	55%	72.3%
#10	Regular Expression Matching3 sources	Hard	53%	31.2%
#26	Remove Duplicates from Sorted Array3 sources	Easy	53%	63.2%
#128	Longest Consecutive Sequence3 sources	Medium	53%	47.2%
#387	First Unique Character in a String3 sources	Easy	53%	65.8%
#706	Design HashMap3 sources	Easy	53%	66.7%
#3522	Calculate Score After Performing Instructions3 sources	Medium	53%	57.2%
#1606	Find Servers That Handled Most Number of Requests3 sources	Hard	53%	45.6%
#5	Longest Palindromic Substring3 sources	Medium	51%	38.2%
#19	Remove Nth Node From End of List3 sources	Medium	51%	52.0%
#69	Sqrt(x)3 sources	Easy	51%	42.1%
#149	Max Points on a Line3 sources	Hard	51%	31.0%
#237	Delete Node in a Linked List3 sources	Medium	51%	84.1%
#297	Serialize and Deserialize Binary Tree3 sources	Hard	51%	61.1%
#341	Flatten Nested List Iterator3 sources	Medium	51%	65.8%
#565	Array Nesting3 sources	Medium	51%	56.7%
#996	Number of Squareful Arrays3 sources	Hard	51%	51.6%
#17	Letter Combinations of a Phone Number3 sources	Medium	50%	66.4%
#33	Search in Rotated Sorted Array3 sources	Medium	50%	45.2%
#104	Maximum Depth of Binary Tree3 sources	Easy	50%	78.4%
#221	Maximal Square3 sources	Medium	50%	50.6%
#232	Implement Queue using Stacks3 sources	Easy	50%	70.1%
#257	Binary Tree Paths3 sources	Easy	50%	69.0%
#394	Decode String3 sources	Medium	50%	62.9%
#621	Task Scheduler3 sources	Medium	50%	63.4%
#1047	Remove All Adjacent Duplicates In String3 sources	Easy	50%	73.6%
#2023	Number of Pairs of Strings With Concatenation Equal to Target3 sources	Medium	50%	75.5%
#2397	Maximum Rows Covered by Columns3 sources	Medium	50%	58.2%
#2972	Count the Number of Incremovable Subarrays II3 sources	Hard	50%	40.5%
#2970	Count the Number of Incremovable Subarrays I3 sources	Easy	50%	56.8%
#3030	Find the Grid of Region Average3 sources	Medium	50%	43.8%
#11	Container With Most Water3 sources	Medium	50%	60.4%
#22	Generate Parentheses3 sources	Medium	50%	78.9%
#55	Jump Game3 sources	Medium	50%	41.2%
#167	Two Sum II - Input Array Is Sorted3 sources	Medium	50%	65.4%
#252	Meeting Rooms3 sources	Easy	50%	59.5%
#273	Integer to English Words3 sources	Hard	50%	35.1%
#658	Find K Closest Elements3 sources	Medium	50%	49.9%
#733	Flood Fill3 sources	Easy	50%	68.6%
#509	Fibonacci Number3 sources	Easy	50%	74.3%
#1275	Find Winner on a Tic Tac Toe Game3 sources	Easy	50%	54.7%
#68	Text Justification3 sources	Hard	50%	51.5%
#344	Reverse String3 sources	Easy	50%	81.0%
#460	LFU Cache3 sources	Hard	49%	49.7%
#8	String to Integer (atoi)3 sources	Medium	43%	21.3%
#46	Permutations3 sources	Medium	43%	82.1%
#57	Insert Interval3 sources	Medium	43%	45.5%
#239	Sliding Window Maximum3 sources	Hard	43%	49.0%
#322	Coin Change3 sources	Medium	43%	48.7%
#1650	Lowest Common Ancestor of a Binary Tree III3 sources	Medium	43%	83.0%
#2150	Find All Lonely Numbers in the Array3 sources	Medium	43%	63.6%
#2502	Design Memory Allocator3 sources	Medium	43%	50.4%
#2	Add Two Numbers3 sources	Medium	39%	48.8%
#13	Roman to Integer3 sources	Easy	39%	66.8%
#73	Set Matrix Zeroes3 sources	Medium	39%	63.3%
#79	Word Search3 sources	Medium	39%	47.7%
#134	Gas Station3 sources	Medium	39%	48.3%
#162	Find Peak Element3 sources	Medium	39%	47.1%
#242	Valid Anagram3 sources	Easy	39%	68.3%
#787	Cheapest Flights Within K Stops3 sources	Medium	39%	42.2%
#876	Middle of the Linked List3 sources	Easy	39%	82.1%
#994	Rotting Oranges3 sources	Medium	39%	59.0%
#895	Maximum Frequency Stack3 sources	Hard	39%	66.9%
#855	Exam Room3 sources	Medium	39%	43.6%
#2591	Distribute Money to Maximum Children3 sources	Easy	39%	20.6%
#841	Keys and Rooms3 sources	Medium	39%	76.0%
#112	Path Sum3 sources	Easy	39%	55.3%
#309	Best Time to Buy and Sell Stock with Cooldown3 sources	Medium	39%	62.4%
#477	Total Hamming Distance3 sources	Medium	39%	55.1%
#428	Serialize and Deserialize N-ary Tree3 sources	Hard	39%	68.9%
#72	Edit Distance3 sources	Medium	39%	60.9%
#39	Combination Sum3 sources	Medium	38%	76.8%
#75	Sort Colors3 sources	Medium	38%	70.0%
#97	Interleaving String3 sources	Medium	38%	44.3%
#123	Best Time to Buy and Sell Stock III3 sources	Hard	38%	54.2%
#143	Reorder List3 sources	Medium	38%	65.7%
#202	Happy Number3 sources	Easy	38%	59.9%
#268	Missing Number3 sources	Easy	38%	72.3%
#274	H-Index3 sources	Medium	38%	41.6%
#328	Odd Even Linked List3 sources	Medium	38%	62.6%
#378	Kth Smallest Element in a Sorted Matrix3 sources	Medium	38%	64.8%
#412	Fizz Buzz3 sources	Easy	38%	75.7%
#468	Validate IP Address3 sources	Medium	38%	28.4%
#647	Palindromic Substrings3 sources	Medium	38%	73.0%
#1011	Capacity To Ship Packages Within D Days3 sources	Medium	38%	74.3%
#688	Knight Probability in Chessboard3 sources	Medium	38%	57.2%
#269	Alien Dictionary3 sources	Hard	38%	37.3%
#635	Design Log Storage System3 sources	Medium	38%	59.6%
#211	Design Add and Search Words Data Structure3 sources	Medium	38%	48.7%
#2065	Maximum Path Quality of a Graph3 sources	Hard	38%	62.6%
#108	Convert Sorted Array to Binary Search Tree3 sources	Easy	38%	75.8%
#1087	Brace Expansion3 sources	Medium	38%	66.9%
#188	Best Time to Buy and Sell Stock IV3 sources	Hard	38%	50.7%
#198	House Robber3 sources	Medium	38%	53.4%
#314	Binary Tree Vertical Order Traversal3 sources	Medium	38%	57.9%
#3074	Apple Redistribution into Boxes3 sources	Easy	38%	78.6%
#71	Simplify Path3 sources	Medium	38%	50.9%
#92	Reverse Linked List II3 sources	Medium	38%	51.9%
#124	Binary Tree Maximum Path Sum3 sources	Hard	38%	42.5%
#332	Reconstruct Itinerary3 sources	Hard	35%	44.7%
#126	Word Ladder II3 sources	Hard	35%	27.8%
#329	Longest Increasing Path in a Matrix3 sources	Hard	35%	56.8%
#18	4Sum3 sources	Medium	30%	41.1%
#27	Remove Element3 sources	Easy	30%	62.1%
#45	Jump Game II3 sources	Medium	30%	43.1%
#47	Permutations II3 sources	Medium	30%	63.7%
#74	Search a 2D Matrix3 sources	Medium	30%	54.3%
#98	Validate Binary Search Tree3 sources	Medium	30%	36.0%
#100	Same Tree3 sources	Easy	30%	67.5%
#150	Evaluate Reverse Polish Notation3 sources	Medium	30%	58.2%
#153	Find Minimum in Rotated Sorted Array3 sources	Medium	30%	55.0%
#160	Intersection of Two Linked Lists3 sources	Easy	30%	64.2%
#217	Contains Duplicate3 sources	Easy	30%	64.5%
#224	Basic Calculator3 sources	Hard	30%	47.0%
#349	Intersection of Two Arrays3 sources	Easy	30%	78.0%
#438	Find All Anagrams in a String3 sources	Medium	30%	54.1%
#463	Island Perimeter3 sources	Easy	30%	74.5%
#503	Next Greater Element II3 sources	Medium	30%	68.7%
#515	Find Largest Value in Each Tree Row3 sources	Medium	30%	66.3%
#523	Continuous Subarray Sum3 sources	Medium	30%	31.5%
#628	Maximum Product of Three Numbers3 sources	Easy	30%	46.1%
#692	Top K Frequent Words3 sources	Medium	30%	60.4%
#528	Random Pick with Weight3 sources	Medium	30%	49.2%
#907	Sum of Subarray Minimums3 sources	Medium	30%	38.8%
#973	K Closest Points to Origin3 sources	Medium	30%	69.2%
#759	Employee Free Time3 sources	Hard	30%	73.0%
#1041	Robot Bounded In Circle3 sources	Medium	30%	56.6%
#2347	Best Poker Hand3 sources	Easy	30%	61.9%
#359	Logger Rate Limiter3 sources	Easy	30%	76.9%
#1197	Minimum Knight Moves3 sources	Medium	30%	42.0%
#340	Longest Substring with At Most K Distinct Characters3 sources	Medium	30%	50.1%
#724	Find Pivot Index3 sources	Easy	30%	63.2%
#1472	Design Browser History3 sources	Medium	30%	78.4%
#158	Read N Characters Given read4 II - Call Multiple Times3 sources	Hard	30%	43.3%
#199	Binary Tree Right Side View3 sources	Medium	30%	70.7%
#820	Short Encoding of Words3 sources	Medium	30%	60.9%
#243	Shortest Word Distance3 sources	Easy	30%	66.4%
#37	Sudoku Solver3 sources	Hard	30%	65.6%
#731	My Calendar II3 sources	Medium	30%	63.3%
#986	Interval List Intersections3 sources	Medium	30%	73.1%
#1091	Shortest Path in Binary Matrix3 sources	Medium	30%	51.8%
#2435	Paths in Matrix Whose Sum Is Divisible by K3 sources	Hard	30%	58.7%
#277	Find the Celebrity3 sources	Medium	30%	49.0%
#212	Word Search II3 sources	Hard	30%	38.6%
#736	Parse Lisp Expression3 sources	Hard	30%	53.8%
#678	Valid Parenthesis String3 sources	Medium	30%	40.3%
#3408	Design Task Manager3 sources	Medium	30%	48.9%
#670	Maximum Swap3 sources	Medium	30%	52.1%
#785	Is Graph Bipartite?3 sources	Medium	30%	59.6%
#6	Zigzag Conversion3 sources	Medium	25%	54.5%
#25	Reverse Nodes in k-Group3 sources	Hard	25%	66.6%
#41	First Missing Positive3 sources	Hard	25%	43.2%
#76	Minimum Window Substring3 sources	Hard	25%	47.9%
#84	Largest Rectangle in Histogram3 sources	Hard	25%	50.3%
#101	Symmetric Tree3 sources	Easy	25%	61.6%
#176	Second Highest Salary3 sourcesSQL	Medium	25%	47.5%
#203	Remove Linked List Elements3 sources	Easy	25%	54.9%
#204	Count Primes3 sources	Medium	25%	36.2%
#218	The Skyline Problem3 sources	Hard	25%	45.6%
#219	Contains Duplicate II3 sources	Easy	25%	51.5%
#225	Implement Stack using Queues3 sources	Easy	25%	70.4%
#278	First Bad Version3 sources	Easy	25%	47.3%
#345	Reverse Vowels of a String3 sources	Easy	25%	61.7%
#355	Design Twitter3 sources	Medium	25%	45.1%
#424	Longest Repeating Character Replacement3 sources	Medium	25%	60.1%
#493	Reverse Pairs3 sources	Hard	25%	34.7%
#542	01 Matrix3 sources	Medium	25%	54.4%
#543	Diameter of Binary Tree3 sources	Easy	25%	65.8%
#605	Can Place Flowers3 sources	Easy	25%	29.2%
#680	Valid Palindrome II3 sources	Easy	25%	44.5%
#839	Similar String Groups3 sources	Hard	25%	56.4%
#849	Maximize Distance to Closest Person3 sources	Medium	25%	49.9%
#909	Snakes and Ladders3 sources	Medium	25%	48.2%
#953	Verifying an Alien Dictionary3 sources	Easy	25%	56.0%
#1249	Minimum Remove to Make Valid Parentheses3 sources	Medium	25%	71.5%
#1352	Product of the Last K Numbers3 sources	Medium	25%	63.0%
#1570	Dot Product of Two Sparse Vectors3 sources	Medium	25%	89.9%
#1657	Determine if Two Strings Are Close3 sources	Medium	25%	54.4%
#2104	Sum of Subarray Ranges3 sources	Medium	25%	61.5%
#2351	First Letter to Appear Twice3 sources	Easy	25%	75.1%
#317	Shortest Distance from All Buildings3 sources	Hard	25%	45.0%
#1242	Web Crawler Multithreaded3 sources	Medium	25%	51.3%
#769	Max Chunks To Make Sorted3 sources	Medium	25%	64.2%
#3163	String Compression III3 sources	Medium	25%	67.1%
#103	Binary Tree Zigzag Level Order Traversal3 sources	Medium	25%	64.1%
#2788	Split Strings by Separator3 sources	Easy	25%	76.4%
#824	Goat Latin3 sources	Easy	25%	70.1%
#843	Guess the Word3 sources	Hard	25%	36.7%
#480	Sliding Window Median3 sources	Hard	25%	39.0%
#661	Image Smoother3 sources	Easy	25%	69.4%
#133	Clone Graph3 sources	Medium	25%	65.7%
#874	Walking Robot Simulation3 sources	Medium	25%	64.6%
#1213	Intersection of Three Sorted Arrays3 sources	Easy	25%	80.0%
#157	Read N Characters Given Read43 sources	Easy	25%	42.6%
#1168	Optimize Water Distribution in a Village3 sources	Hard	25%	65.6%
#1143	Longest Common Subsequence3 sources	Medium	25%	59.3%
#3613	Minimize Maximum Component Cost3 sources	Medium	25%	43.7%
#30	Substring with Concatenation of All Words3 sources	Hard	25%	34.7%
#173	Binary Search Tree Iterator3 sources	Medium	25%	76.7%
#1870	Minimum Speed to Arrive on Time3 sources	Medium	25%	48.0%
#109	Convert Sorted List to Binary Search Tree3 sources	Medium	25%	66.9%
#1854	Maximum Population Year3 sources	Easy	25%	64.3%
#338	Counting Bits3 sources	Easy	25%	80.7%
#737	Sentence Similarity II3 sources	Medium	25%	51.4%
#707	Design Linked List3 sources	Medium	25%	30.5%
#535	Encode and Decode TinyURL3 sources	Medium	25%	86.7%
#365	Water and Jug Problem3 sources	Medium	25%	45.9%
#209	Minimum Size Subarray Sum3 sources	Medium	25%	52.2%
#435	Non-overlapping Intervals3 sources	Medium	25%	57.4%
#490	The Maze3 sources	Medium	25%	60.5%
#933	Number of Recent Calls3 sources	Easy	25%	78.7%
#399	Evaluate Division3 sources	Medium	25%	64.4%
#455	Assign Cookies3 sources	Easy	25%	55.3%
#1229	Meeting Scheduler3 sources	Medium	25%	55.2%
#695	Max Area of Island3 sources	Medium	25%	74.1%
#161	One Edit Distance3 sources	Medium	25%	34.6%
#636	Exclusive Time of Functions3 sources	Medium	25%	66.3%
#931	Minimum Falling Path Sum3 sources	Medium	25%	60.9%
#567	Permutation in String3 sources	Medium	25%	49.2%
#918	Maximum Sum Circular Subarray3 sources	Medium	25%	50.7%
#82	Remove Duplicates from Sorted List II3 sources	Medium	25%	52.1%
#889	Construct Binary Tree from Preorder and Postorder Traversal3 sources	Medium	25%	78.1%
#2633	Convert Object to JSON String3 sources	Medium	25%	78.1%
#346	Moving Average from Data Stream3 sources	Easy	25%	80.2%
#863	All Nodes Distance K in Binary Tree3 sources	Medium	25%	67.8%
#432	All O`one Data Structure3 sources	Hard	25%	44.4%
#1392	Longest Happy Prefix3 sources	Hard	25%	53.6%
#110	Balanced Binary Tree3 sources	Easy	25%	58.7%
#1740	Find Distance in a Binary Tree3 sources	Medium	25%	74.4%
#875	Koko Eating Bananas3 sources	Medium	25%	50.2%
#496	Next Greater Element I3 sources	Easy	25%	76.5%
#729	My Calendar I3 sources	Medium	25%	58.3%
#67	Add Binary	Easy	25%	58.3%
#90	Subsets II	Medium	25%	61.6%
#91	Decode Ways	Medium	25%	38.2%
#138	Copy List with Random Pointer	Medium	25%	63.3%
#213	House Robber II	Medium	25%	45.2%
#235	Lowest Common Ancestor of a Binary Search Tree	Medium	25%	70.9%
#485	Max Consecutive Ones	Easy	25%	65.6%
#867	Transpose Matrix	Easy	25%	76.7%
#885	Spiral Matrix III	Medium	25%	84.6%
#291	Word Pattern II	Medium	25%	49.0%
#912	Sort an Array	Medium	25%	55.9%
#3019	Number of Changing Keys	Easy	25%	80.8%
#704	Binary Search2 sources	Easy	22%	0.6%
#772	Basic Calculator III2 sources	Hard	22%	0.5%
#684	Redundant Connection2 sources	Medium	22%	0.7%
#417	Pacific Atlantic Water Flow2 sources	Medium	22%	0.6%
#416	Partition Equal Subset Sum2 sources	Medium	22%	0.5%
#1117	Building H2O2 sources	Medium	22%	0.6%
#59	Spiral Matrix II2 sources	Medium	22%	0.8%

Showing 310 of 310 questionsWindow: All Time

Apple Technical Interview Overview & Company-Wise Questions

Software engineering and technical interviews at Apple emphasize real-world problem solving, algorithmic efficiency, and scalable data structure design. The curated dataset above contains 310 verified LeetCode problems, categorized by frequency and filtered across recent interview seasons.

Frequently Asked Questions

What are the top LeetCode questions for Apple?

Leading questions include LRU Cache, Two Sum, Merge Intervals. Reviewing questions with higher recency (within the last 30 to 90 days) yields the highest return on preparation time.

Where can I practice company-wise LeetCode questions for Apple?

You can practice all 310 Apple LeetCode questions right here on LeetMap Pro. Filter by 30-day, 3-month, and 6-month recency, track your progress with local checkpoints, and practice curated SQL problems completely free.

How should I prepare for Apple coding rounds?

Begin by reviewing Medium-difficulty problems (185 tracked), which constitute the majority of technical rounds. Complement coding practice with foundational DSA patterns like Sliding Window, Two Pointers, and Graph Traversal.

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Recommended Patterns

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