Implement ad filtering and concurrent 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 Onsite rounds at Roku.

Q: What role is this question designed for?

This question is commonly asked for Backend Engineer candidates at Roku during technical interviews.

Question

Implement ad filtering and concurrent cache

PracHub · Accepted Answer

This question evaluates algorithmic problem-solving and systems-programming skills by combining an ad candidate filtering task that tests data-structure selection, complexity analysis, and test-design thinking with a concurrent LRU cache task that tests implementation of a fixed-capacity data structure, thread-safety, and concurrency primitives.

Quick Overview

Implement ad filtering and concurrent cache