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Design an in-memory TODO list API

Last updated: Mar 29, 2026

Quick Overview

This question evaluates object-oriented design, API and data-modeling skills, including selection of in-memory data structures, performance considerations, and handling of edge cases such as missing ids and duplicates.

  • medium
  • Bloomberg
  • Software Engineering Fundamentals
  • Software Engineer

Design an in-memory TODO list API

Company: Bloomberg

Role: Software Engineer

Category: Software Engineering Fundamentals

Difficulty: medium

Interview Round: Technical Screen

Quick Answer: This question evaluates object-oriented design, API and data-modeling skills, including selection of in-memory data structures, performance considerations, and handling of edge cases such as missing ids and duplicates.

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|Home/Software Engineering Fundamentals/Bloomberg

Design an in-memory TODO list API

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Bloomberg
Feb 12, 2026, 12:00 AM
mediumSoftware EngineerTechnical ScreenSoftware Engineering Fundamentals
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