Dashboard Questions Topics Companies Sheets

Apple Interview Questions

390 coding problems asked in Apple interviews. Prepare for your technical interview with real questions.

390

Problems

125

Easy

194

Medium

Hard

Difficulty

All390 Easy125 Medium194 Hard71

Title	Solve	Difficulty	Companies	Topics
138. Copy List with Random Pointer	Solve	Medium	Aditya Birla group+30	Hash Table Linked List
139. Word Break	Solve	Medium	Accenture+38	Array Dynamic Programming+4
146. LRU Cache	Solve	Medium	Accolite+56	Design Doubly-Linked List+2
148. Sort List	Solve	Medium	Amazon+4	Divide and Conquer Linked List+3
151. Reverse Words in a String	Solve	Medium	Amazon+5	String Two Pointers
162. Find Peak Element	Solve	Medium	Amazon+8	Array Binary Search
167. Two Sum II - Input Array Is Sorted	Solve	Medium	Adobe+5	Array Binary Search+1
176. Second Highest Salary	Solve	Medium	Accenture+10	Database
178. Rank Scores	Solve	Medium	Adobe+4	Database
179. Largest Number	Solve	Medium	Adobe+8	Array Greedy+2
180. Consecutive Numbers	Solve	Medium	Adobe+4	Database
184. Department Highest Salary	Solve	Medium	Adobe+3	Database
198. House Robber	Solve	Medium	Adobe+8	Array Dynamic Programming
199. Binary Tree Right Side View	Solve	Medium	Amazon+8	Binary Tree Breadth-First Search+2
200. Number of Islands	Solve	Medium	Adobe+40	Array Breadth-First Search+3
204. Count Primes	Solve	Medium	Adobe+6	Array Enumeration+2
207. Course Schedule	Solve	Medium	Amazon+8	Breadth-First Search Depth-First Search+2
208. Implement Trie (Prefix Tree)	Solve	Medium	Amazon+8	Design Hash Table+2
209. Minimum Size Subarray Sum	Solve	Medium	Amazon+7	Array Binary Search+2
210. Course Schedule II	Solve	Medium	Amazon+14	Breadth-First Search Depth-First Search+2
211. Design Add and Search Words Data Structure	Solve	Medium	Amazon+6	Depth-First Search Design+2
215. Kth Largest Element in an Array	Solve	Medium	ABCO+44	Array Divide and Conquer+3
227. Basic Calculator II	Solve	Medium	Amazon+9	Math Stack+1
229. Majority Element II	Solve	Medium	Accolite+21	Array Counting+2
235. Lowest Common Ancestor of a Binary Search Tree	Solve	Medium	Amazon+5	Binary Search Tree Binary Tree+2
236. Lowest Common Ancestor of a Binary Tree	Solve	Medium	Amazon+9	Binary Tree Depth-First Search+1
238. Product of Array Except Self	Solve	Medium	Adobe+8	Array Prefix Sum
240. Search a 2D Matrix II	Solve	Medium	Amazon+5	Array Binary Search+2
259. 3Sum Smaller	Solve	Medium	Apple+2	Array Binary Search+2
274. H-Index	Solve	Medium	Alation+4	Array Counting Sort+1
277. Find the Celebrity	Solve	Medium	Amazon+5	Graph Interactive+1
279. Perfect Squares	Solve	Medium	Amazon+3	Breadth-First Search Dynamic Programming+1
281. Zigzag Iterator	Solve	Medium	Amazon+3	Array Design+2
284. Peeking Iterator	Solve	Medium	Amazon+3	Array Design+1
287. Find the Duplicate Number	Solve	Medium	Adobe+30	Array Binary Search+2
289. Game of Life	Solve	Medium	Adobe+8	Array Matrix+1
300. Longest Increasing Subsequence	Solve	Medium	Accenture+78	Array Binary Search+1
309. Best Time to Buy and Sell Stock with Cooldown	Solve	Medium	Adobe+5	Array Dynamic Programming
313. Super Ugly Number	Solve	Medium	Apple+2	Array Dynamic Programming+1
316. Remove Duplicate Letters	Solve	Medium	Amazon+6	Greedy Monotonic Stack+2
319. Bulb Switcher	Solve	Medium	Apple+3	Brainteaser Math
341. Flatten Nested List Iterator	Solve	Medium	Airbnb+10	Depth-First Search Design+4
343. Integer Break	Solve	Medium	Adobe+12	Dynamic Programming Math
347. Top K Frequent Elements	Solve	Medium	Adobe+9	Array Bucket Sort+6
362. Design Hit Counter	Solve	Medium	Affirm+7	Array Binary Search+3
373. Find K Pairs with Smallest Sums	Solve	Medium	Amazon+4	Array Heap (Priority Queue)
377. Combination Sum IV	Solve	Medium	Adobe+9	Array Dynamic Programming
384. Shuffle an Array	Solve	Medium	Apple+4	Array Design+2
386. Lexicographical Numbers	Solve	Medium	Amazon+6	Depth-First Search Trie
394. Decode String	Solve	Medium	Adobe+16	Recursion Stack+1