FrontendHaltNetworking·Intermediate·Conceptual·1 min read
What problem does over-fetching describe, and which style tends to cause it?
Short interview answer
Over-fetching is receiving more fields than a screen needs, wasting bandwidth and parsing time. REST endpoints returning a fixed resource shape commonly cause it when different consumers need different subsets of the same resource.
Key takeaway
Explain the underlying mental model clearly, then support it with a concrete example and its trade-offs.