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This question evaluates data-structure design skills, understanding of hashing and randomization for uniform sampling, handling of duplicate elements, and analysis of average-case time complexity, with an added focus on managing time-to-live (TTL) expirations.

  • easy
  • LinkedIn
  • Coding & Algorithms
  • Software Engineer

Design O(1) Randomized Multiset

Company: LinkedIn

Role: Software Engineer

Category: Coding & Algorithms

Difficulty: easy

Interview Round: Technical Screen

Quick Answer: This question evaluates data-structure design skills, understanding of hashing and randomization for uniform sampling, handling of duplicate elements, and analysis of average-case time complexity, with an added focus on managing time-to-live (TTL) expirations.

Last updated: Apr 19, 2026
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