Level-Ordered Dependency Build Order

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

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

Question

Level-Ordered Dependency Build Order

PracHub · Accepted Answer

This question evaluates a candidate's ability to model dependency relationships as a graph and produce a valid topological build order. It tests knowledge of level-by-level (BFS-style) topological sorting, along with correct detection of cycles and missing references, a common way to assess graph traversal and edge-case reasoning in coding interviews.

Quick Overview

Level-Ordered Dependency Build Order