Your question is Design Graph Data Model. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Design the data model for a part of their system related to building graphs.
Clarify the graph entities, relationships, properties, lifecycle, and consistency requirements before proposing a schema. Explain how graph data would be ingested, updated, queried, versioned, and transformed into features or embeddings for downstream ML. Discuss the tradeoffs between relational, document, key-value, and graph-oriented storage, along with testing and failure handling.