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
133. Clone Graph	Solve	Medium	Amazon+5	Breadth-First Search Depth-First Search+2
136. Single Number	Solve	Easy	Adobe+8	Array Bit Manipulation
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
140. Word Break II	Solve	Hard	Adobe+7	Array Backtracking+5
143. Reorder List	Solve	Medium	Adobe+6	Linked List Recursion+2
145. Binary Tree Postorder Traversal	Solve	Easy	Facebook+1	Binary Tree Depth-First Search+2
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
150. Evaluate Reverse Polish Notation	Solve	Medium	Amazon+6	Array Math+1
153. Find Minimum in Rotated Sorted Array	Solve	Medium	Adobe+6	Array Binary Search
155. Min Stack	Solve	Medium	Adobe+7	Design Stack
157. Read N Characters Given Read4	Solve	Easy	Amazon+4	Array Interactive+1
158. Read N Characters Given read4 II - Call Multiple Times	Solve	Hard	Facebook+3	Array Interactive+1
160. Intersection of Two Linked Lists	Solve	Easy	Adobe+7	Hash Table Linked List+1
161. One Edit Distance	Solve	Medium	Facebook+2	String Two Pointers
162. Find Peak Element	Solve	Medium	Amazon+8	Array Binary Search
163. Missing Ranges	Solve	Easy	Facebook	Array
164. Maximum Gap	Solve	Medium	Amazon+1	Array Bucket Sort+2
166. Fraction to Recurring Decimal	Solve	Medium	Airbnb+3	Hash Table Math+1
169. Majority Element	Solve	Easy	Adobe+8	Array Counting+3
173. Binary Search Tree Iterator	Solve	Medium	Amazon+5	Binary Search Tree Binary Tree+4
175. Combine Two Tables	Solve	Easy	Adobe+6	Database
179. Largest Number	Solve	Medium	Adobe+8	Array Greedy+2
180. Consecutive Numbers	Solve	Medium	Adobe+4	Database
185. Department Top Three Salaries	Solve	Hard	Amazon+4	Database
189. Rotate Array	Solve	Medium	Amazon+6	Array Math+1
190. Reverse Bits	Solve	Easy	Apple+4	Bit Manipulation Divide and Conquer
191. Number of 1 Bits	Solve	Easy	Amazon+6	Bit Manipulation Divide and Conquer
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
203. Remove Linked List Elements	Solve	Easy	Adobe+3	Linked List Recursion
206. Reverse Linked List	Solve	Easy	Amazon+8	Linked List Recursion
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
212. Word Search II	Solve	Hard	Amazon+9	Array Backtracking+3
215. Kth Largest Element in an Array	Solve	Medium	ABCO+44	Array Divide and Conquer+3
219. Contains Duplicate II	Solve	Easy	Adobe+6	Array Hash Table+1
224. Basic Calculator	Solve	Hard	Adobe+8	Math Recursion+2
226. Invert Binary Tree	Solve	Easy	Amazon+5	Binary Tree Breadth-First Search+2
227. Basic Calculator II	Solve	Medium	Amazon+9	Math Stack+1
228. Summary Ranges	Solve	Easy	Adobe+7	Array
229. Majority Element II	Solve	Medium	Accolite+21	Array Counting+2
230. Kth Smallest Element in a BST	Solve	Medium	Amazon+4	Binary Search Tree Binary Tree+2
234. Palindrome Linked List	Solve	Easy	Adobe+10	Linked List Recursion+2
235. Lowest Common Ancestor of a Binary Search Tree	Solve	Medium	Amazon+5	Binary Search Tree Binary Tree+2