FrontendHaltNetworking·Intermediate·Conceptual·1 min read
What does GraphQL's N+1 problem refer to?
Short interview answer
Resolving nested fields naively can issue one database or service call per parent record inside a loop. A batching layer such as DataLoader coalesces those calls into a single batched request per level.
Key takeaway
Explain the underlying mental model clearly, then support it with a concrete example and its trade-offs.