8 Fully-Solved Typical Amazon Object Oriented Design Interview Problems (with Full Code & Comment)
Perfect for preparing for Amazon/Meta/Google and other big tech companies object oriented design aka. low level design interviews. Includes 8 real problems, clean Python code, and design explanations. Use this to rehearse or study the principles. Including extra links to go further into studying this topic.
This guide already helped my classmates, friends and me pass low level design question interview for different companies.
Updated: July 2025
What’s new in the July 2025 update: full code and explanation for every problem, SOLID + design pattern explanation, help you understand what are the most important to pay attention to. Also add the frequency of each Amazon OOD question in recent interviews.
Mindset tip: start by asking as many clarifying questions as possible—OOD has no specific answer, so the interview is really about your communication and thought flow. Naming a design pattern is a nice bonus, but not the pass/fail. Before you touch the IDE, sketch the key entities and interfaces in the IDE comments, get a nod from the interviewer, then dive into code.
You'll get 8 fully solved Object Oriented Design interview questions — including problem descriptions, Python code with full comments, and clean design patterns used in real interviews. 60 pages of helpful content in the July 2025 updated version.