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Find longest common contiguous subarray

Last updated: Mar 29, 2026

Quick Overview

This question evaluates a candidate's proficiency in array and substring algorithm design, including concepts such as dynamic programming, hashing, and efficient search techniques.

  • Medium
  • Amazon
  • Coding & Algorithms
  • Software Engineer

Find longest common contiguous subarray

Company: Amazon

Role: Software Engineer

Category: Coding & Algorithms

Difficulty: Medium

Interview Round: Onsite

Given two integer arrays A and B, find the length of the longest contiguous subarray that appears in both arrays. If multiple exist, return any one pair of starting indices as well. Discuss possible approaches (e.g., dynamic programming, binary search with rolling hash) and analyze time and space complexity.

Quick Answer: This question evaluates a candidate's proficiency in array and substring algorithm design, including concepts such as dynamic programming, hashing, and efficient search techniques.

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Amazon
Sep 6, 2025, 12:00 AM
Software Engineer
Onsite
Coding & Algorithms
1
0

Given two integer arrays A and B, find the length of the longest contiguous subarray that appears in both arrays. If multiple exist, return any one pair of starting indices as well. Discuss possible approaches (e.g., dynamic programming, binary search with rolling hash) and analyze time and space complexity.

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