Apple LeetCode Interview Questions

Practice 298 coding problems currently tagged to Apple. Use the frequency and topic signals to build a focused software engineering interview practice plan.

Last updated: September 28, 2026

74 Easy

177 Medium

47 Hard

Top Topics at Apple

Array String Hash Table Breadth-First Search Depth-First Search

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Problem	DifficultyDiff	Frequency	Topics	Action
LRU Cache 100%	MediumM	100%	Hash Table Linked List+2	Solve→
Two Sum 86.9%	EasyE	86.9%	Array Hash Table	Solve→
Merge Intervals 84.5%	MediumM	84.5%	Array Sorting+1	Solve→
Number of Islands 84.5%	MediumM	84.5%	Array Depth-First Search+3	Solve→
Best Time to Buy and Sell Stock 79.3%	EasyE	79.3%	Array Dynamic Programming	Solve→
Design Hit Counter 79.3%	MediumM	79.3%	Array Binary Search+3	Solve→
Rotate Array 78.2%	MediumM	78.2%	Array Math+1	Solve→
Group Anagrams 77.6%	MediumM	77.6%	Array Hash Table+2	Solve→
Top K Frequent Elements 77%	MediumM	77%	Array Hash Table+6	Solve→
Longest Common Prefix 76.4%	EasyE	76.4%	Array String+1	Solve→
Valid Sudoku 75.8%	MediumM	75.8%	Array Hash Table+1	Solve→
Reverse Linked List 75.8%	EasyE	75.8%	Linked List Recursion	Solve→
Course Schedule II 73%	MediumM	73%	Depth-First Search Breadth-First Search+2	Solve→
Course Schedule 72.2%	MediumM	72.2%	Depth-First Search Breadth-First Search+3	Solve→
Valid Parentheses 71.5%	EasyE	71.5%	String Stack+1	Solve→
Valid Palindrome 70.6%	EasyE	70.6%	Two Pointers String	Solve→
Product of Array Except Self 69.8%	MediumM	69.8%	Array Prefix Sum	Solve→
Maximum Subarray 68%	MediumM	68%	Array Divide and Conquer+1	Solve→
Spiral Matrix 68%	MediumM	68%	Array Matrix+1	Solve→
Reverse Words in a String 68%	MediumM	68%	Two Pointers String	Solve→
Kth Largest Element in an Array 68%	MediumM	68%	Array Divide and Conquer+3	Solve→
Time Based Key-Value Store 68%	MediumM	68%	Hash Table String+2	Solve→
Longest Substring Without Repeating Characters 67%	MediumM	67%	Hash Table String+1	Solve→
Merge k Sorted Lists 67%	HardH	67%	Linked List Divide and Conquer+3	Solve→
Reverse Integer 66%	MediumM	66%	Math	Solve→

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Rotate Image 66%	MediumM	66%	Array Math+1	Solve→
Best Time to Buy and Sell Stock II 66%	MediumM	66%	Array Dynamic Programming+1	Solve→
Subarray Product Less Than K 64.9%	MediumM	64.9%	Array Binary Search+2	Solve→
Median of Two Sorted Arrays 63.7%	HardH	63.7%	Array Binary Search+1	Solve→
Find First and Last Position of Element in Sorted Array 63.7%	MediumM	63.7%	Array Binary Search	Solve→
Trapping Rain Water 63.7%	HardH	63.7%	Array Two Pointers+3	Solve→
Meeting Rooms II 63.7%	MediumM	63.7%	Array Two Pointers+4	Solve→
Subarray Sum Equals K 63.7%	MediumM	63.7%	Array Hash Table+1	Solve→
Reverse Bits 62.5%	EasyE	62.5%	Divide and Conquer Bit Manipulation	Solve→
Lowest Common Ancestor of a Binary Tree 62.5%	MediumM	62.5%	Tree Depth-First Search+3	Solve→
Move Zeroes 62.5%	EasyE	62.5%	Array Two Pointers	Solve→
Insert Delete GetRandom O(1) 62.5%	MediumM	62.5%	Array Hash Table+3	Solve→
Design Circular Queue 62.5%	MediumM	62.5%	Array Linked List+2	Solve→
Merge Two Sorted Lists 61.2%	EasyE	61.2%	Linked List Recursion	Solve→
Snapshot Array 61.2%	MediumM	61.2%	Array Hash Table+3	Solve→
Word Ladder 59.9%	HardH	59.9%	Hash Table String+2	Solve→
Min Stack 59.9%	MediumM	59.9%	Stack Design	Solve→
Basic Calculator II 59.9%	MediumM	59.9%	Math String+1	Solve→
Find Median from Data Stream 59.9%	HardH	59.9%	Two Pointers Design+3	Solve→
Merge Sorted Array 58.4%	EasyE	58.4%	Array Two Pointers+1	Solve→
Word Break 58.4%	MediumM	58.4%	Array Hash Table+5	Solve→
3Sum 56.8%	MediumM	56.8%	Array Two Pointers+1	Solve→
Climbing Stairs 56.8%	EasyE	56.8%	Math Dynamic Programming+1	Solve→
Search a 2D Matrix II 56.8%	MediumM	56.8%	Array Binary Search+2	Solve→
Design Tic-Tac-Toe 56.8%	MediumM	56.8%	Array Hash Table+3	Solve→

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Find the Index of the First Occurrence in a String 55%	EasyE	55%	Two Pointers String+4	Solve→
Compare Version Numbers 55%	MediumM	55%	Two Pointers String	Solve→
Number of 1 Bits 55%	EasyE	55%	Divide and Conquer Bit Manipulation	Solve→
Implement Trie (Prefix Tree) 55%	MediumM	55%	Hash Table String+2	Solve→
Peeking Iterator 55%	MediumM	55%	Array Design+1	Solve→
Ransom Note 55%	EasyE	55%	Hash Table String+1	Solve→
String Compression 55%	MediumM	55%	Two Pointers String	Solve→
Best Time to Buy and Sell Stock with Transaction Fee 55%	MediumM	55%	Array Dynamic Programming+1	Solve→
Regular Expression Matching 53.1%	HardH	53.1%	String Dynamic Programming+1	Solve→
Remove Duplicates from Sorted Array 53.1%	EasyE	53.1%	Array Two Pointers	Solve→
Binary Tree Level Order Traversal 53.1%	MediumM	53.1%	Tree Breadth-First Search+1	Solve→
Longest Consecutive Sequence 53.1%	MediumM	53.1%	Array Hash Table+1	Solve→
First Unique Character in a String 53.1%	EasyE	53.1%	Hash Table String+2	Solve→
Design HashMap 53.1%	EasyE	53.1%	Array Hash Table+3	Solve→
Calculate Score After Performing Instructions 53.1%	MediumM	53.1%	Array Hash Table+2	Solve→
Find Servers That Handled Most Number of Requests 53.1%	HardH	53.1%	Array Heap (Priority Queue)+2	Solve→
Longest Palindromic Substring 51%	MediumM	51%	Two Pointers String+2	Solve→
Remove Nth Node From End of List 51%	MediumM	51%	Linked List Two Pointers	Solve→
Sqrt(x) 51%	EasyE	51%	Math Binary Search+1	Solve→
Pascal's Triangle 51%	EasyE	51%	Array Dynamic Programming	Solve→
Max Points on a Line 51%	HardH	51%	Array Hash Table+4	Solve→
Delete Node in a Linked List 51%	MediumM	51%	Linked List	Solve→
Serialize and Deserialize Binary Tree 51%	HardH	51%	String Tree+4	Solve→
Flatten Nested List Iterator 51%	MediumM	51%	Stack Tree+4	Solve→
Array Nesting 51%	MediumM	51%	Array Depth-First Search	Solve→

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Number of Squareful Arrays 51%	HardH	51%	Array Hash Table+5	Solve→
Letter Combinations of a Phone Number 48.7%	MediumM	48.7%	Hash Table String+1	Solve→
Search in Rotated Sorted Array 48.7%	MediumM	48.7%	Array Binary Search	Solve→
Maximum Depth of Binary Tree 48.7%	EasyE	48.7%	Tree Depth-First Search+2	Solve→
Maximal Square 48.7%	MediumM	48.7%	Array Dynamic Programming+1	Solve→
Implement Queue using Stacks 48.7%	EasyE	48.7%	Stack Design+1	Solve→
Binary Tree Paths 48.7%	EasyE	48.7%	String Backtracking+3	Solve→
Decode String 48.7%	MediumM	48.7%	String Stack+1	Solve→
LFU Cache 48.7%	HardH	48.7%	Hash Table Linked List+2	Solve→
Task Scheduler 48.7%	MediumM	48.7%	Array Hash Table+4	Solve→
Remove All Adjacent Duplicates In String 48.7%	EasyE	48.7%	String Stack	Solve→
Number of Pairs of Strings With Concatenation Equal to Target 48.7%	MediumM	48.7%	Array Hash Table+2	Solve→
Maximum Rows Covered by Columns 48.7%	MediumM	48.7%	Array Backtracking+3	Solve→
Count the Number of Incremovable Subarrays II 48.7%	HardH	48.7%	Array Two Pointers+1	Solve→
Count the Number of Incremovable Subarrays I 48.7%	EasyE	48.7%	Array Two Pointers+2	Solve→
Find the Grid of Region Average 48.7%	MediumM	48.7%	Array Matrix	Solve→
Container With Most Water 46%	MediumM	46%	Array Two Pointers+1	Solve→
Generate Parentheses 46%	MediumM	46%	String Dynamic Programming+2	Solve→
Jump Game 46%	MediumM	46%	Array Dynamic Programming+1	Solve→
Two Sum II - Input Array Is Sorted 46%	MediumM	46%	Array Two Pointers+1	Solve→
Meeting Rooms 46%	EasyE	46%	Array Sorting+1	Solve→
Integer to English Words 46%	HardH	46%	Math String+1	Solve→
Find K Closest Elements 46%	MediumM	46%	Array Two Pointers+4	Solve→
Flood Fill 46%	EasyE	46%	Array Depth-First Search+2	Solve→
Fibonacci Number 46%	EasyE	46%	Math Dynamic Programming+2	Solve→

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Find Winner on a Tic Tac Toe Game 46%	EasyE	46%	Array Hash Table+2	Solve→
String to Integer (atoi) 43%	MediumM	43%	String	Solve→
Permutations 43%	MediumM	43%	Array Backtracking	Solve→
Insert Interval 43%	MediumM	43%	Array	Solve→
Text Justification 43%	HardH	43%	Array String+1	Solve→
Sliding Window Maximum 43%	HardH	43%	Array Queue+4	Solve→
Coin Change 43%	MediumM	43%	Array Dynamic Programming+3	Solve→
Reverse String 43%	EasyE	43%	Two Pointers String	Solve→
Lowest Common Ancestor of a Binary Tree III 43%	MediumM	43%	Hash Table Two Pointers+4	Solve→
Find All Lonely Numbers in the Array 43%	MediumM	43%	Array Hash Table+1	Solve→
Design Memory Allocator 43%	MediumM	43%	Array Hash Table+2	Solve→
Add Two Numbers 39.4%	MediumM	39.4%	Linked List Math+1	Solve→
Roman to Integer 39.4%	EasyE	39.4%	Hash Table Math+1	Solve→
Set Matrix Zeroes 39.4%	MediumM	39.4%	Array Hash Table+1	Solve→
Word Search 39.4%	MediumM	39.4%	Array String+3	Solve→
Gas Station 39.4%	MediumM	39.4%	Array Greedy	Solve→
Find Peak Element 39.4%	MediumM	39.4%	Array Binary Search	Solve→
Valid Anagram 39.4%	EasyE	39.4%	Hash Table String+1	Solve→
Cheapest Flights Within K Stops 39.4%	MediumM	39.4%	Dynamic Programming Depth-First Search+4	Solve→
Middle of the Linked List 39.4%	EasyE	39.4%	Linked List Two Pointers	Solve→
Rotting Oranges 39.4%	MediumM	39.4%	Array Breadth-First Search+1	Solve→
Maximum Frequency Stack 39.4%	HardH	39.4%	Hash Table Stack+2	Solve→
Exam Room 39.4%	MediumM	39.4%	Design Heap (Priority Queue)+1	Solve→
Distribute Money to Maximum Children 39.4%	EasyE	39.4%	Math Greedy	Solve→
Keys and Rooms 39.4%	MediumM	39.4%	Depth-First Search Breadth-First Search+1	Solve→

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Path Sum 39.4%	EasyE	39.4%	Tree Depth-First Search+2	Solve→
Best Time to Buy and Sell Stock with Cooldown 39.4%	MediumM	39.4%	Array Dynamic Programming	Solve→
Total Hamming Distance 39.4%	MediumM	39.4%	Array Math+1	Solve→
Serialize and Deserialize N-ary Tree 39.4%	HardH	39.4%	String Tree+2	Solve→
Edit Distance 39.4%	MediumM	39.4%	String Dynamic Programming	Solve→
Combination Sum 35%	MediumM	35%	Array Backtracking	Solve→
Sort Colors 35%	MediumM	35%	Array Two Pointers+3	Solve→
Interleaving String 35%	MediumM	35%	String Dynamic Programming	Solve→
Best Time to Buy and Sell Stock III 35%	HardH	35%	Array Dynamic Programming	Solve→
Reorder List 35%	MediumM	35%	Linked List Two Pointers+2	Solve→
Happy Number 35%	EasyE	35%	Hash Table Math+2	Solve→
Missing Number 35%	EasyE	35%	Array Hash Table+4	Solve→
H-Index 35%	MediumM	35%	Array Sorting+1	Solve→
Odd Even Linked List 35%	MediumM	35%	Linked List	Solve→
Reconstruct Itinerary 35%	HardH	35%	Array String+7	Solve→
Kth Smallest Element in a Sorted Matrix 35%	MediumM	35%	Array Binary Search+3	Solve→
Fizz Buzz 35%	EasyE	35%	Math String+1	Solve→
Validate IP Address 35%	MediumM	35%	String	Solve→
Palindromic Substrings 35%	MediumM	35%	Two Pointers String+1	Solve→
Capacity To Ship Packages Within D Days 35%	MediumM	35%	Array Binary Search	Solve→
Knight Probability in Chessboard 35%	MediumM	35%	Dynamic Programming	Solve→
Word Ladder II 35%	HardH	35%	Hash Table String+3	Solve→
Alien Dictionary 35%	HardH	35%	Array String+5	Solve→
Design Log Storage System 35%	MediumM	35%	Hash Table String+2	Solve→
Design Add and Search Words Data Structure 35%	MediumM	35%	String Depth-First Search+2	Solve→

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Maximum Path Quality of a Graph 35%	HardH	35%	Array Backtracking+1	Solve→
Convert Sorted Array to Binary Search Tree 35%	EasyE	35%	Array Divide and Conquer+3	Solve→
Longest Increasing Path in a Matrix 35%	HardH	35%	Array Dynamic Programming+7	Solve→
Brace Expansion 35%	MediumM	35%	String Backtracking+3	Solve→
4Sum 29.5%	MediumM	29.5%	Array Two Pointers+1	Solve→
Remove Element 29.5%	EasyE	29.5%	Array Two Pointers	Solve→
Jump Game II 29.5%	MediumM	29.5%	Array Dynamic Programming+1	Solve→
Permutations II 29.5%	MediumM	29.5%	Array Backtracking+1	Solve→
Search a 2D Matrix 29.5%	MediumM	29.5%	Array Binary Search+1	Solve→
Validate Binary Search Tree 29.5%	MediumM	29.5%	Tree Depth-First Search+2	Solve→
Same Tree 29.5%	EasyE	29.5%	Tree Depth-First Search+2	Solve→
Evaluate Reverse Polish Notation 29.5%	MediumM	29.5%	Array Math+1	Solve→
Find Minimum in Rotated Sorted Array 29.5%	MediumM	29.5%	Array Binary Search	Solve→
Intersection of Two Linked Lists 29.5%	EasyE	29.5%	Hash Table Linked List+1	Solve→
Best Time to Buy and Sell Stock IV 29.5%	HardH	29.5%	Array Dynamic Programming	Solve→
House Robber 29.5%	MediumM	29.5%	Array Dynamic Programming	Solve→
Contains Duplicate 29.5%	EasyE	29.5%	Array Hash Table+1	Solve→
Basic Calculator 29.5%	HardH	29.5%	Math String+2	Solve→
Binary Tree Vertical Order Traversal 29.5%	MediumM	29.5%	Hash Table Tree+4	Solve→
Intersection of Two Arrays 29.5%	EasyE	29.5%	Array Hash Table+3	Solve→
Find All Anagrams in a String 29.5%	MediumM	29.5%	Hash Table String+1	Solve→
Island Perimeter 29.5%	EasyE	29.5%	Array Depth-First Search+2	Solve→
Next Greater Element II 29.5%	MediumM	29.5%	Array Stack+1	Solve→
Find Largest Value in Each Tree Row 29.5%	MediumM	29.5%	Tree Depth-First Search+2	Solve→
Continuous Subarray Sum 29.5%	MediumM	29.5%	Array Hash Table+3	Solve→

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Maximum Product of Three Numbers 29.5%	EasyE	29.5%	Array Math+1	Solve→
Top K Frequent Words 29.5%	MediumM	29.5%	Array Hash Table+6	Solve→
Random Pick with Weight 29.5%	MediumM	29.5%	Array Math+3	Solve→
Sum of Subarray Minimums 29.5%	MediumM	29.5%	Array Dynamic Programming+2	Solve→
K Closest Points to Origin 29.5%	MediumM	29.5%	Array Math+6	Solve→
Apple Redistribution into Boxes 29.5%	EasyE	29.5%	Array Greedy+1	Solve→
Employee Free Time 29.5%	HardH	29.5%	Array Sweep Line+2	Solve→
Robot Bounded In Circle 29.5%	MediumM	29.5%	Math String+1	Solve→
Best Poker Hand 29.5%	EasyE	29.5%	Array Hash Table+1	Solve→
Logger Rate Limiter 29.5%	EasyE	29.5%	Hash Table Design+1	Solve→
Minimum Knight Moves 29.5%	MediumM	29.5%	Breadth-First Search Heuristic Search+2	Solve→
Longest Substring with At Most K Distinct Characters 29.5%	MediumM	29.5%	Hash Table String+1	Solve→
Find Pivot Index 29.5%	EasyE	29.5%	Array Prefix Sum	Solve→
Design Browser History 29.5%	MediumM	29.5%	Array Linked List+4	Solve→
Read N Characters Given read4 II - Call Multiple Times 29.5%	HardH	29.5%	Array Simulation+1	Solve→
Binary Tree Right Side View 29.5%	MediumM	29.5%	Tree Depth-First Search+2	Solve→
Short Encoding of Words 29.5%	MediumM	29.5%	Array Hash Table+2	Solve→
Shortest Word Distance 29.5%	EasyE	29.5%	Array String	Solve→
Sudoku Solver 29.5%	HardH	29.5%	Array Hash Table+4	Solve→
My Calendar II 29.5%	MediumM	29.5%	Array Binary Search+4	Solve→
Interval List Intersections 29.5%	MediumM	29.5%	Array Two Pointers+1	Solve→
Shortest Path in Binary Matrix 29.5%	MediumM	29.5%	Array Breadth-First Search+1	Solve→
Paths in Matrix Whose Sum Is Divisible by K 29.5%	HardH	29.5%	Array Dynamic Programming+1	Solve→
Find the Celebrity 29.5%	MediumM	29.5%	Two Pointers Graph Theory+1	Solve→
Word Search II 29.5%	HardH	29.5%	Array String+3	Solve→

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Parse Lisp Expression 29.5%	HardH	29.5%	Hash Table String+2	Solve→
Valid Parenthesis String 29.5%	MediumM	29.5%	String Dynamic Programming+3	Solve→
Design Task Manager 29.5%	MediumM	29.5%	Hash Table Design+2	Solve→
Maximum Swap 29.5%	MediumM	29.5%	Math Greedy	Solve→
Is Graph Bipartite? 29.5%	MediumM	29.5%	Depth-First Search Breadth-First Search+4	Solve→
Zigzag Conversion 22%	MediumM	22%	String	Solve→
Reverse Nodes in k-Group 22%	HardH	22%	Linked List Recursion	Solve→
First Missing Positive 22%	HardH	22%	Array Hash Table	Solve→
Simplify Path 22%	MediumM	22%	String Stack	Solve→
Minimum Window Substring 22%	HardH	22%	Hash Table String+1	Solve→
Largest Rectangle in Histogram 22%	HardH	22%	Array Stack+2	Solve→
Reverse Linked List II 22%	MediumM	22%	Linked List	Solve→
Symmetric Tree 22%	EasyE	22%	Tree Depth-First Search+2	Solve→
Binary Tree Maximum Path Sum 22%	HardH	22%	Dynamic Programming Tree+3	Solve→
Second Highest Salary 22%	MediumM	22%	Database	Solve→
Remove Linked List Elements 22%	EasyE	22%	Linked List Recursion	Solve→
Count Primes 22%	MediumM	22%	Array Math+5	Solve→
The Skyline Problem 22%	HardH	22%	Array Divide and Conquer+6	Solve→
Contains Duplicate II 22%	EasyE	22%	Array Hash Table+1	Solve→
Implement Stack using Queues 22%	EasyE	22%	Stack Design+1	Solve→
First Bad Version 22%	EasyE	22%	Binary Search Interactive	Solve→
Reverse Vowels of a String 22%	EasyE	22%	Two Pointers String	Solve→
Design Twitter 22%	MediumM	22%	Hash Table Linked List+2	Solve→
Longest Repeating Character Replacement 22%	MediumM	22%	Hash Table String+1	Solve→
Reverse Pairs 22%	HardH	22%	Array Binary Search+6	Solve→

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01 Matrix 22%	MediumM	22%	Array Dynamic Programming+2	Solve→
Diameter of Binary Tree 22%	EasyE	22%	Tree Depth-First Search+2	Solve→
Can Place Flowers 22%	EasyE	22%	Array Greedy	Solve→
Valid Palindrome II 22%	EasyE	22%	Two Pointers String+1	Solve→
Similar String Groups 22%	HardH	22%	Array Hash Table+4	Solve→
Maximize Distance to Closest Person 22%	MediumM	22%	Array	Solve→
Snakes and Ladders 22%	MediumM	22%	Array Breadth-First Search+1	Solve→
Verifying an Alien Dictionary 22%	EasyE	22%	Array Hash Table+1	Solve→
Minimum Remove to Make Valid Parentheses 22%	MediumM	22%	String Stack	Solve→
Product of the Last K Numbers 22%	MediumM	22%	Array Math+3	Solve→
Dot Product of Two Sparse Vectors 22%	MediumM	22%	Array Hash Table+3	Solve→
Determine if Two Strings Are Close 22%	MediumM	22%	Hash Table String+2	Solve→
Sum of Subarray Ranges 22%	MediumM	22%	Array Stack+1	Solve→
First Letter to Appear Twice 22%	EasyE	22%	Hash Table String+2	Solve→
Shortest Distance from All Buildings 22%	HardH	22%	Array Breadth-First Search+1	Solve→
Web Crawler Multithreaded 22%	MediumM	22%	Depth-First Search Breadth-First Search+1	Solve→
Max Chunks To Make Sorted 22%	MediumM	22%	Array Stack+3	Solve→
String Compression III 22%	MediumM	22%	String	Solve→
Binary Tree Zigzag Level Order Traversal 22%	MediumM	22%	Tree Breadth-First Search+1	Solve→
Split Strings by Separator 22%	EasyE	22%	Array String	Solve→
Goat Latin 22%	EasyE	22%	String	Solve→
Guess the Word 22%	HardH	22%	Array Math+4	Solve→
Sliding Window Median 22%	HardH	22%	Array Hash Table+3	Solve→
Image Smoother 22%	EasyE	22%	Array Matrix	Solve→
Clone Graph 22%	MediumM	22%	Hash Table Depth-First Search+2	Solve→

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Walking Robot Simulation 22%	MediumM	22%	Array Hash Table+1	Solve→
Intersection of Three Sorted Arrays 22%	EasyE	22%	Array Hash Table+2	Solve→
Read N Characters Given Read4 22%	EasyE	22%	Array Simulation+1	Solve→
Optimize Water Distribution in a Village 22%	HardH	22%	Union-Find Graph Theory+5	Solve→
Longest Common Subsequence 22%	MediumM	22%	String Dynamic Programming+1	Solve→
Minimize Maximum Component Cost 22%	MediumM	22%	Binary Search Union-Find+2	Solve→
Substring with Concatenation of All Words 22%	HardH	22%	Hash Table String+1	Solve→
Binary Search Tree Iterator 22%	MediumM	22%	Stack Tree+4	Solve→
Minimum Speed to Arrive on Time 22%	MediumM	22%	Array Binary Search	Solve→
Convert Sorted List to Binary Search Tree 22%	MediumM	22%	Linked List Divide and Conquer+3	Solve→
Maximum Population Year 22%	EasyE	22%	Array Counting+1	Solve→
Counting Bits 22%	EasyE	22%	Dynamic Programming Bit Manipulation	Solve→
Sentence Similarity II 22%	MediumM	22%	Array Hash Table+4	Solve→
Design Linked List 22%	MediumM	22%	Linked List Design	Solve→
Encode and Decode TinyURL 22%	MediumM	22%	Hash Table String+2	Solve→
Water and Jug Problem 22%	MediumM	22%	Math Depth-First Search+5	Solve→
Minimum Size Subarray Sum 22%	MediumM	22%	Array Binary Search+2	Solve→
Non-overlapping Intervals 22%	MediumM	22%	Array Dynamic Programming+2	Solve→
The Maze 22%	MediumM	22%	Array Depth-First Search+2	Solve→
Number of Recent Calls 22%	EasyE	22%	Design Queue+1	Solve→
Evaluate Division 22%	MediumM	22%	Array String+7	Solve→
Assign Cookies 22%	EasyE	22%	Array Two Pointers+3	Solve→
Meeting Scheduler 22%	MediumM	22%	Array Two Pointers+1	Solve→
Max Area of Island 22%	MediumM	22%	Array Depth-First Search+3	Solve→
One Edit Distance 22%	MediumM	22%	Two Pointers String	Solve→

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Exclusive Time of Functions 22%	MediumM	22%	Array Stack	Solve→
Minimum Falling Path Sum 22%	MediumM	22%	Array Dynamic Programming+1	Solve→
Permutation in String 22%	MediumM	22%	Hash Table Two Pointers+2	Solve→
Maximum Sum Circular Subarray 22%	MediumM	22%	Array Divide and Conquer+3	Solve→
Remove Duplicates from Sorted List II 22%	MediumM	22%	Linked List Two Pointers	Solve→
Construct Binary Tree from Preorder and Postorder Traversal 22%	MediumM	22%	Array Hash Table+3	Solve→
Convert Object to JSON String 22%	MediumM	22%		Solve→
Moving Average from Data Stream 22%	EasyE	22%	Array Design+2	Solve→
All Nodes Distance K in Binary Tree 22%	MediumM	22%	Hash Table Tree+3	Solve→
All O`one Data Structure 22%	HardH	22%	Hash Table Linked List+2	Solve→
Longest Happy Prefix 22%	HardH	22%	String Rolling Hash+4	Solve→
Balanced Binary Tree 22%	EasyE	22%	Tree Depth-First Search+1	Solve→
Find Distance in a Binary Tree 22%	MediumM	22%	Hash Table Tree+5	Solve→
Koko Eating Bananas 22%	MediumM	22%	Array Binary Search	Solve→
Next Greater Element I 22%	EasyE	22%	Array Hash Table+2	Solve→
My Calendar I 22%	MediumM	22%	Array Binary Search+3	Solve→
Binary Search 22%	EasyE	22%	Array Binary Search	Solve→
Basic Calculator III 22%	HardH	22%	Math String+2	Solve→
Redundant Connection 22%	MediumM	22%	Depth-First Search Breadth-First Search+2	Solve→
Pacific Atlantic Water Flow 22%	MediumM	22%	Array Depth-First Search+2	Solve→
Partition Equal Subset Sum 22%	MediumM	22%	Array Dynamic Programming+2	Solve→
Building H2O 22%	MediumM	22%	Concurrency	Solve→
Spiral Matrix II 22%	MediumM	22%	Array Matrix+1	Solve→

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Frequently Asked Questions

What LeetCode problems are tagged to Apple?

Our current Apple practice dataset contains 298 tagged coding problems, including LRU Cache, Two Sum, Merge Intervals. The difficulty breakdown is 74 Easy, 177 Medium, and 47 Hard problems.

How should I prepare for a Apple coding interview?

Focus on the most frequently asked problems first, especially those with high frequency scores. Apple interviews typically emphasize Array and String. Practice explaining your thought process while coding.

What is the difficulty level of Apple coding interviews?

Based on our data, Apple interviews include 74 Easy (25%), 177 Medium (59%), and 47 Hard (16%) problems.

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Frequently Asked Questions

What LeetCode problems are tagged to Apple?

How should I prepare for a Apple coding interview?

What is the difficulty level of Apple coding interviews?

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