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This question evaluates a candidate's ability to design and implement in-memory text indexes and related data structures, covering inverted indexing, tokenization and case-insensitive word matching, update/deletion handling, and analysis of time and space complexity.

  • hard
  • Amazon
  • Coding & Algorithms
  • Software Engineer

Build a Searchable Sentence Index

Company: Amazon

Role: Software Engineer

Category: Coding & Algorithms

Difficulty: hard

Interview Round: Onsite

Quick Answer: This question evaluates a candidate's ability to design and implement in-memory text indexes and related data structures, covering inverted indexing, tokenization and case-insensitive word matching, update/deletion handling, and analysis of time and space complexity.

Last updated: May 30, 2026
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