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
496. Next Greater Element I	Solve	Easy	Adobe+9	Array Hash Table+2
498. Diagonal Traverse	Solve	Medium	Facebook+2	Array Matrix+1
503. Next Greater Element II	Solve	Medium	Adobe+9	Array Monotonic Stack+1
509. Fibonacci Number	Solve	Easy	Adobe+8	Dynamic Programming Math+2
515. Find Largest Value in Each Tree Row	Solve	Medium	Amazon+5	Binary Tree Breadth-First Search+2
518. Coin Change II	Solve	Medium	Accenture+68	Array Dynamic Programming
523. Continuous Subarray Sum	Solve	Medium	Amazon+6	Array Hash Table+2
525. Contiguous Array	Solve	Medium	Amazon+3	Array Hash Table+1
528. Random Pick with Weight	Solve	Medium	Amazon+7	Array Binary Search+3
529. Minesweeper	Solve	Medium	Amazon+6	Array Breadth-First Search+2
536. Construct Binary Tree from String	Solve	Medium	Facebook	Binary Tree Depth-First Search+3
538. Convert BST to Greater Tree	Solve	Medium	Amazon+2	Binary Search Tree Binary Tree+2
540. Single Element in a Sorted Array	Solve	Medium	Amazon+5	Array Binary Search
542. 01 Matrix	Solve	Medium	Adobe+16	Array Breadth-First Search+2
543. Diameter of Binary Tree	Solve	Easy	Amazon+5	Binary Tree Depth-First Search+1
545. Boundary of Binary Tree	Solve	Medium	Amazon+3	Binary Tree Depth-First Search+1
548. Split Array with Equal Sum	Solve	Hard	Facebook	Array Hash Table+1
556. Next Greater Element III	Solve	Medium	Adobe+10	Math String+1
557. Reverse Words in a String III	Solve	Easy	Accolite+27	String Two Pointers
560. Subarray Sum Equals K	Solve	Medium	Adobe+15	Array Hash Table+1
566. Reshape the Matrix	Solve	Easy	Bloomberg+1	Array Matrix+1
572. Subtree of Another Tree	Solve	Easy	Amazon+3	Binary Tree Depth-First Search+3
578. Get Highest Answer Rate Question	Solve	Medium	Facebook	Database
584. Find Customer Referee	Solve	Easy	Adobe+5	Database
595. Big Countries	Solve	Easy	Adobe+6	Database
597. Friend Requests I: Overall Acceptance Rate	Solve	Easy	Facebook	Database
602. Friend Requests II: Who Has the Most Friends	Solve	Medium	Amazon+1	Database
605. Can Place Flowers	Solve	Easy	Amazon+4	Array Greedy
606. Construct String from Binary Tree	Solve	Medium	Adobe+3	Binary Tree Depth-First Search+2
616. Add Bold Tag in String	Solve	Medium	Facebook	Array Hash Table+3
617. Merge Two Binary Trees	Solve	Easy	Amazon+3	Binary Tree Breadth-First Search+2
621. Task Scheduler	Solve	Medium	Amazon+4	Array Counting+4
622. Design Circular Queue	Solve	Medium	Airbnb+5	Array Design+2
623. Add One Row to Tree	Solve	Medium	Amazon+2	Binary Tree Breadth-First Search+2
636. Exclusive Time of Functions	Solve	Medium	DoorDash+4	Array Stack
637. Average of Levels in Binary Tree	Solve	Easy	Amazon+2	Binary Tree Breadth-First Search+2
638. Shopping Offers	Solve	Medium	Amazon+3	Array Backtracking+4
643. Maximum Average Subarray I	Solve	Easy	Facebook	Array Sliding Window
647. Palindromic Substrings	Solve	Medium	Expedia+2	Dynamic Programming String+1
648. Replace Words	Solve	Medium	Facebook	Array Hash Table+2
658. Find K Closest Elements	Solve	Medium	Amazon+6	Array Binary Search+4
661. Image Smoother	Solve	Easy	Amazon+2	Array Matrix
662. Maximum Width of Binary Tree	Solve	Medium	Amazon+4	Binary Tree Breadth-First Search+2
666. Path Sum IV	Solve	Medium	Alibaba+1	Array Binary Tree+3
669. Trim a Binary Search Tree	Solve	Medium	Amazon+3	Binary Search Tree Binary Tree+2
670. Maximum Swap	Solve	Medium	Amazon+3	Greedy Math
674. Longest Continuous Increasing Subsequence	Solve	Easy	Facebook	Array
676. Implement Magic Dictionary	Solve	Medium	Facebook+1	Depth-First Search Design+3
678. Valid Parenthesis String	Solve	Medium	Amazon+4	Dynamic Programming Greedy+2
680. Valid Palindrome II	Solve	Easy	Amazon+6	Greedy String+1