Dashboard Questions Topics Companies Sheets

Facebook Interview Questions

524 coding problems asked in Facebook interviews. Prepare for your technical interview with real questions.

524

Problems

139

Easy

302

Medium

Hard

Difficulty

All524 Easy139 Medium302 Hard83

Title	Solve	Difficulty	Companies	Topics
4. Median of Two Sorted Arrays	Solve	Hard	Accolite+38	Array Binary Search+1
10. Regular Expression Matching	Solve	Hard	Adobe+8	Dynamic Programming Recursion+1
23. Merge k Sorted Lists	Solve	Hard	Adobe+17	Divide and Conquer Heap (Priority Queue)+2
25. Reverse Nodes in k-Group	Solve	Hard	Amazon+8	Linked List Recursion
32. Longest Valid Parentheses	Solve	Hard	Amazon+6	Dynamic Programming Stack+1
37. Sudoku Solver	Solve	Hard	Adobe+11	Array Backtracking+2
41. First Missing Positive	Solve	Hard	Adobe+7	Array Hash Table
42. Trapping Rain Water	Solve	Hard	Adobe+21	Array Dynamic Programming+3
44. Wildcard Matching	Solve	Hard	Amazon+5	Dynamic Programming Greedy+2
51. N-Queens	Solve	Hard	Adobe+7	Array Backtracking
60. Permutation Sequence	Solve	Hard	Adobe+1	Math Recursion
65. Valid Number	Solve	Hard	Facebook+1	String
68. Text Justification	Solve	Hard	Adobe+25	Array Simulation+1
76. Minimum Window Substring	Solve	Hard	Adobe+9	Hash Table Sliding Window+1
84. Largest Rectangle in Histogram	Solve	Hard	Adobe+7	Array Monotonic Stack+1
124. Binary Tree Maximum Path Sum	Solve	Hard	Adobe+14	Binary Tree Depth-First Search+2
126. Word Ladder II	Solve	Hard	Amazon+4	Backtracking Breadth-First Search+2
127. Word Ladder	Solve	Hard	Adobe+8	Breadth-First Search Hash Table+1
140. Word Break II	Solve	Hard	Adobe+7	Array Backtracking+5
158. Read N Characters Given read4 II - Call Multiple Times	Solve	Hard	Facebook+3	Array Interactive+1
185. Department Top Three Salaries	Solve	Hard	Amazon+4	Database
212. Word Search II	Solve	Hard	Amazon+9	Array Backtracking+3
224. Basic Calculator	Solve	Hard	Adobe+8	Math Recursion+2
239. Sliding Window Maximum	Solve	Hard	Accion Labs India+66	Array Heap (Priority Queue)+3
265. Paint House II	Solve	Hard	Facebook+2	Array Dynamic Programming
269. Alien Dictionary	Solve	Hard	Airbnb+8	Array Breadth-First Search+4
273. Integer to English Words	Solve	Hard	Amazon+7	Math Recursion+1
282. Expression Add Operators	Solve	Hard	Facebook	Backtracking Math+1
295. Find Median from Data Stream	Solve	Hard	Adobe+33	Data Stream Design+3
296. Best Meeting Point	Solve	Hard	Expedia+2	Array Math+2
301. Remove Invalid Parentheses	Solve	Hard	Amazon+1	Backtracking Breadth-First Search+1
317. Shortest Distance from All Buildings	Solve	Hard	DoorDash+3	Array Breadth-First Search+1
329. Longest Increasing Path in a Matrix	Solve	Hard	Amazon+14	Array Breadth-First Search+6
332. Reconstruct Itinerary	Solve	Hard	Amazon+9	Depth-First Search Eulerian Circuit+1
336. Palindrome Pairs	Solve	Hard	Airbnb+5	Array Hash Table+2
381. Insert Delete GetRandom O(1) - Duplicates allowed	Solve	Hard	Affirm+2	Array Design+3
403. Frog Jump	Solve	Hard	Adobe+21	Array Dynamic Programming
410. Split Array Largest Sum	Solve	Hard	Amazon+5	Array Binary Search+3
428. Serialize and Deserialize N-ary Tree	Solve	Hard	Amazon+7	Breadth-First Search Depth-First Search+2
480. Sliding Window Median	Solve	Hard	Facebook+3	Array Hash Table+2
489. Robot Room Cleaner	Solve	Hard	Amazon+5	Backtracking Interactive
548. Split Array with Equal Sum	Solve	Hard	Facebook	Array Hash Table+1
689. Maximum Sum of 3 Non-Overlapping Subarrays	Solve	Hard	Facebook	Array Dynamic Programming
691. Stickers to Spell Word	Solve	Hard	Facebook	Array Backtracking+4
711. Number of Distinct Islands II	Solve	Hard	Amazon+1	Breadth-First Search Depth-First Search+3
715. Range Module	Solve	Hard	Amazon+6	Design Ordered Set+1
716. Max Stack	Solve	Hard	Amazon+6	Design Doubly-Linked List+3
719. Find K-th Smallest Pair Distance	Solve	Hard	Facebook	Array Binary Search+2
745. Prefix and Suffix Search	Solve	Hard	Facebook+2	Array Design+3
772. Basic Calculator III	Solve	Hard	Amazon+12	Math Recursion+2