FrontendHaltNetworking·Intermediate·Conceptual·1 min read
Why might a system use REST, GraphQL, and WebSockets together?
Short interview answer
Each solves a different problem: REST or GraphQL for typical request/response reads and writes, and a WebSocket or SSE channel specifically for the subset of data that must update in real time, like a live order status.
Key takeaway
Explain the underlying mental model clearly, then support it with a concrete example and its trade-offs.