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
316. Remove Duplicate Letters	Solve	Medium	Amazon+6	Greedy Monotonic Stack+2
319. Bulb Switcher	Solve	Medium	Apple+3	Brainteaser Math
321. Create Maximum Number	Solve	Hard	Apple+1	Array Greedy+3
329. Longest Increasing Path in a Matrix	Solve	Hard	Amazon+14	Array Breadth-First Search+6
336. Palindrome Pairs	Solve	Hard	Airbnb+5	Array Hash Table+2
338. Counting Bits	Solve	Easy	Adobe+33	Bit Manipulation Dynamic Programming
341. Flatten Nested List Iterator	Solve	Medium	Airbnb+10	Depth-First Search Design+4
342. Power of Four	Solve	Easy	Adobe+4	Bit Manipulation Math+1
343. Integer Break	Solve	Medium	Adobe+12	Dynamic Programming Math
344. Reverse String	Solve	Easy	Adobe+6	String Two Pointers
347. Top K Frequent Elements	Solve	Medium	Adobe+9	Array Bucket Sort+6
349. Intersection of Two Arrays	Solve	Easy	Adobe+7	Array Binary Search+3
359. Logger Rate Limiter	Solve	Easy	Amazon+5	Data Stream Design+1
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
383. Ransom Note	Solve	Easy	Adobe+3	Counting Hash Table+1
384. Shuffle an Array	Solve	Medium	Apple+4	Array Design+2
386. Lexicographical Numbers	Solve	Medium	Amazon+6	Depth-First Search Trie
387. First Unique Character in a String	Solve	Easy	Amazon+8	Counting Hash Table+2
389. Find the Difference	Solve	Easy	Adobe+4	Bit Manipulation Hash Table+2
391. Perfect Rectangle	Solve	Hard	Apple+1	Array Line Sweep
394. Decode String	Solve	Medium	Adobe+16	Recursion Stack+1
396. Rotate Function	Solve	Medium	Amazon+2	Array Dynamic Programming+1
400. Nth Digit	Solve	Medium	Apple	Binary Search Math
403. Frog Jump	Solve	Hard	Adobe+21	Array Dynamic Programming
410. Split Array Largest Sum	Solve	Hard	Amazon+5	Array Binary Search+3
412. Fizz Buzz	Solve	Easy	Apple+2	Math Simulation+1
414. Third Maximum Number	Solve	Easy	Amazon+2	Array Sorting
415. Add Strings	Solve	Easy	Amazon+7	Math Simulation+1
416. Partition Equal Subset Sum	Solve	Medium	Amazon+5	Array Dynamic Programming
419. Battleships in a Board	Solve	Medium	Amazon+6	Array Depth-First Search+1
428. Serialize and Deserialize N-ary Tree	Solve	Hard	Amazon+7	Breadth-First Search Depth-First Search+2
433. Minimum Genetic Mutation	Solve	Medium	Amazon+4	Breadth-First Search Hash Table+1
434. Number of Segments in a String	Solve	Easy	Apple	String
438. Find All Anagrams in a String	Solve	Medium	Adobe+9	Hash Table Sliding Window+1
442. Find All Duplicates in an Array	Solve	Medium	Adobe+4	Array Hash Table
443. String Compression	Solve	Medium	Amazon+8	String Two Pointers
445. Add Two Numbers II	Solve	Medium	Accenture+49	Linked List Math+1
448. Find All Numbers Disappeared in an Array	Solve	Easy	Amazon+3	Array Hash Table
451. Sort Characters By Frequency	Solve	Medium	Amazon+4	Bucket Sort Counting+4
455. Assign Cookies	Solve	Easy	Apple	Array Greedy+2
460. LFU Cache	Solve	Hard	Amazon+9	Design Doubly-Linked List+2
467. Unique Substrings in Wraparound String	Solve	Medium	Apple+1	Dynamic Programming String
474. Ones and Zeroes	Solve	Medium	Apple	Array Dynamic Programming+1
476. Number Complement	Solve	Easy	Amazon+1	Bit Manipulation
485. Max Consecutive Ones	Solve	Easy	Apple+1	Array
496. Next Greater Element I	Solve	Easy	Adobe+9	Array Hash Table+2
503. Next Greater Element II	Solve	Medium	Adobe+9	Array Monotonic Stack+1
508. Most Frequent Subtree Sum	Solve	Medium	Apple	Binary Tree Depth-First Search+2