Dashboard Questions Topics Companies Sheets

Amazon Interview Questions

1,113 coding problems asked in Amazon interviews. Prepare for your technical interview with real questions.

1,113

Problems

267

Easy

645

Medium

201

Hard

Difficulty

All1113 Easy267 Medium645 Hard201

Title	Solve	Difficulty	Companies	Topics
626. Exchange Seats	Solve	Medium	Amazon+3	Database
632. Smallest Range Covering Elements from K Lists	Solve	Hard	Adobe+8	Array Greedy+4
633. Sum of Square Numbers	Solve	Medium	Amazon+1	Binary Search Math+1
634. Find the Derangement of An Array	Solve	Medium	Amazon+1	Dynamic Programming Math
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
640. Solve the Equation	Solve	Medium	Amazon+1	Math Simulation+1
642. Design Search Autocomplete System	Solve	Hard	Amazon+5	Data Stream Depth-First Search+5
646. Maximum Length of Pair Chain	Solve	Medium	Amazon+12	Array Dynamic Programming+2
650. 2 Keys Keyboard	Solve	Medium	Amazon+1	Dynamic Programming Math
652. Find Duplicate Subtrees	Solve	Medium	Amazon+2	Binary Tree Depth-First Search+2
653. Two Sum IV - Input is a BST	Solve	Easy	Amazon+1	Binary Search Tree Binary Tree+5
654. Maximum Binary Tree	Solve	Medium	Amazon	Array Binary Tree+4
655. Print Binary Tree	Solve	Medium	Amazon+1	Binary Tree Breadth-First Search+2
657. Robot Return to Origin	Solve	Easy	Amazon+3	Simulation String
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
663. Equal Tree Partition	Solve	Medium	Amazon	Binary Tree Depth-First Search+1
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
673. Number of Longest Increasing Subsequence	Solve	Medium	Amazon+6	Array Binary Indexed Tree+2
675. Cut Off Trees for Golf Event	Solve	Hard	Amazon+1	Array Breadth-First Search+2
678. Valid Parenthesis String	Solve	Medium	Amazon+4	Dynamic Programming Greedy+2
680. Valid Palindrome II	Solve	Easy	Amazon+6	Greedy String+1
681. Next Closest Time	Solve	Medium	Amazon+1	Backtracking Enumeration+2
685. Redundant Connection II	Solve	Hard	Amazon	Breadth-First Search Depth-First Search+2
687. Longest Univalue Path	Solve	Medium	Amazon+1	Binary Tree Depth-First Search+1
688. Knight Probability in Chessboard	Solve	Medium	Amazon+5	Dynamic Programming
692. Top K Frequent Words	Solve	Medium	Amazon+8	Bucket Sort Counting+5
694. Number of Distinct Islands	Solve	Medium	Amazon+3	Breadth-First Search Depth-First Search+3
695. Max Area of Island	Solve	Medium	Amazon+8	Array Breadth-First Search+3
696. Count Binary Substrings	Solve	Easy	Adobe+8	String Two Pointers
698. Partition to K Equal Sum Subsets	Solve	Medium	Amazon+2	Array Backtracking+4
700. Search in a Binary Search Tree	Solve	Easy	Amazon	Binary Search Tree Binary Tree+1
701. Insert into a Binary Search Tree	Solve	Medium	Amazon+2	Binary Search Tree Binary Tree+1
703. Kth Largest Element in a Stream	Solve	Easy	Adobe+4	Binary Search Tree Binary Tree+4
704. Binary Search	Solve	Easy	Adobe+8	Array Binary Search
705. Design HashSet	Solve	Easy	Amazon+6	Array Design+3
706. Design HashMap	Solve	Easy	Adobe+26	Array Design+3
707. Design Linked List	Solve	Medium	Amazon+4	Design Linked List
709. To Lower Case	Solve	Easy	Amazon	String
710. Random Pick with Blacklist	Solve	Hard	Amazon+2	Array Binary Search+4
711. Number of Distinct Islands II	Solve	Hard	Amazon+1	Breadth-First Search Depth-First Search+3
713. Subarray Product Less Than K	Solve	Medium	Amazon+2	Array Binary Search+2
714. Best Time to Buy and Sell Stock with Transaction Fee	Solve	Medium	Adobe+4	Array Dynamic Programming+1
715. Range Module	Solve	Hard	Amazon+6	Design Ordered Set+1
716. Max Stack	Solve	Hard	Amazon+6	Design Doubly-Linked List+3
721. Accounts Merge	Solve	Medium	Amazon+6	Array Breadth-First Search+5
724. Find Pivot Index	Solve	Easy	Adobe+8	Array Prefix Sum