🧠 Top 16 Amazon Phone Interview Coding Questions (LeetCode)

Here’s a curated list of 16 real LeetCode problems frequently asked in Amazon phone interviews, based on historical data, mock interviews, and online reports.

#	Problem	Difficulty	Topic Tags
1	Two Sum	Easy	HashMap
2	Longest Substring Without Repeating Characters	Medium	Sliding Window
3	Merge Intervals	Medium	Intervals, Sorting
4	Group Anagrams	Medium	Hashing
5	Valid Parentheses	Easy	Stack
6	K Closest Points to Origin	Medium	Heap, Geometry
7	Maximum Subarray	Easy	Kadane’s Algorithm
8	Search in Rotated Sorted Array	Medium	Binary Search
9	Subarray Sum Equals K	Medium	HashMap, Prefix Sum
10	3Sum	Medium	Two Pointers
11	Product of Array Except Self	Medium	Prefix Product
12	Number of Islands	Medium	DFS / BFS
13	LRU Cache	Medium	LinkedHashMap / Design
14	Clone Graph	Medium	Graph, BFS
15	Word Break	Medium	DP, Trie
16	Minimum Window Substring	Hard	Sliding Window, Hashing

🎯 Prioritization Tips for Amazon:

✅ Practice hashmaps, arrays, strings, and sliding windows heavily.
✅ Be very comfortable with recursion and DFS/BFS (especially for graphs & matrices).
✅ Focus on medium-level problems, especially edge cases and optimization.
✅ Practice dry runs and explaining aloud (Amazon assesses communication during interviews).