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面试面经 · Amazon

【Amazon】【SDE Intern】两轮电面,Coding + Leadership Principles,Bar Raiser 很严格

AmazonSDE InternIntern面经Loop Interview

【Amazon】SDE Intern

基本信息

项目内容
公司Amazon
岗位SDE Intern
轮次OA + Loop Interview(两轮)
时间2025
面型体感Coding 轮中规中矩,Behavioral 轮比重很大,需要认真准备 LP
结果Offer

面试题目(按提问顺序)

Online Assessment(OA,远程,70 min)

  1. Amazon OA Coding 题 #1
  • Given two strings s and t, determine if they are isomorphic. Two strings are isomorphic if the characters in s can be replaced to get t.
  • HashMap 映射题,O(n) 时间。
  1. Amazon OA Coding 题 #2
  • Given an array of integers and a number k, find the maximum sum of a subarray of size k.
  • Sliding Window 固定窗口题。

Loop Interview(两轮,各 45-60 min)

Round 1:Coding + LP(45 min)

  1. Valid Parentheses(LeetCode #20)
  • Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid.
  • Stack 经典题。
  1. Lowest Common Ancestor of a Binary Tree(LeetCode #236)
  • Given a binary tree, find the lowest common ancestor of two given nodes.
  • 递归后序遍历,经典题。
  1. Leadership Principles 问题(Round 1)
  • "Tell me about a time you had to deal with a difficult team member."(对应 LP:Earn Trust)
  • "Describe a situation where you had to make a decision with incomplete information."(对应 LP:Bias for Action)

Round 2:Coding + LP(45 min)

  1. Kth Largest Element in an Array(LeetCode #215)
  • Find the kth largest element in an unsorted array.
  • Min-Heap 或 Quick Select 解法。
  1. Leadership Principles 问题(Round 2)
  • "Tell me about a time you went above and beyond what was expected."(对应 LP:Deliver Results)
  • "Give me an example of a time you had to learn a new skill quickly to complete a project."(对应 LP:Learn and Be Curious)
  • "Describe a time you received critical feedback. How did you handle it?"(对应 LP:Have Backbone; Disagree and Commit)

面试感受 / 反馈

  • Amazon 的面试 一半在考 Behavioral,这点和 Google/Meta 很不同,千万别忽视 LP
  • LP 问题不是走形式,面试官会 deep dive 追问细节,用 STAR 格式回答是必须的
  • Coding 题难度偏 Medium,但面试官非常关注你对边界条件的处理
  • Amazon 对时间复杂度要求没那么高,更看重代码是否 clean、是否有 edge case 处理
  • Bar Raiser 轮(通常是第二轮面试官)对 Leadership Principles 的考察更深入

准备建议

  • Leadership Principles 是重中之重:准备 6-8 个 STAR 故事,覆盖 Amazon 16 条 LP 中的 8-10 条
  • STAR 格式要熟练:Situation → Task → Action → Result,每个故事控制在 3-4 分钟
  • Coding:Stack、Heap、Tree LCA、Sliding Window 是高频题
  • Amazon 喜欢问 "What if..." 的 follow-up,准备好应对变化的能力
  • 面试结束后发 thank-you email,Amazon 的 HR 很看重这个细节