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.

What difficulty level is this coding question?

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

What role is this question designed for?

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

Count Valid Infection Orders | Uber Coding Question

Quick Overview

This question evaluates combinatorial enumeration and algorithmic reasoning by counting valid sequences of state changes in a linear infection process. It is commonly asked in technical interviews because it measures the ability to model propagation constraints, count permutations under adjacency restrictions, and implement efficient solutions within the Coding & Algorithms domain, focusing on practical application rather than purely conceptual understanding.

medium
Uber
Coding & Algorithms
Software Engineer