How do I approach Coding & Algorithms interview questions?

Coding & Algorithms questions require understanding of core concepts and practice. PracHub provides solutions with explanations to help you master coding & algorithms interviews.

What difficulty level is this interview question?

This is a medium difficulty Coding & Algorithms question, commonly asked during Onsite rounds at Meta.

What role is this question designed for?

This question is commonly asked for Machine Learning Engineer candidates at Meta during technical interviews.

Implement LRU cache and copy random list

Last updated: Jun 21, 2026

Quick Overview

This question evaluates competency in data-structure design, pointer and memory management, and hashing-based eviction policies by combining a deep-copy of a linked list with random pointers and an LRU cache requiring O(1) operations, and it belongs to the Coding & Algorithms domain.

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Implement LRU cache and copy random list