Design a Recency-Eviction Cache

Q: How do I practice coding and algorithm questions?

Use PracHub's coding console to write, test, and debug your solutions in Python or JavaScript. View hints, test against sample inputs, and compare with official solutions.

Q: What difficulty level is this coding question?

This is a medium difficulty Coding & Algorithms question, commonly asked during Technical Screen rounds at Pinduoduo.

Q: What role is this question designed for?

This question is commonly asked for Software Engineer candidates at Pinduoduo during technical interviews.

Question

Design a Recency-Eviction Cache

PracHub · Accepted Answer

This question evaluates proficiency with data structures and algorithmic design for implementing a fixed-capacity key-value cache that enforces recency-based eviction while meeting average O(1) get and put performance.

Quick Overview

Design a Recency-Eviction Cache