How would you test Eager vs Explicit Loading?

Answers use simple, clear English.

Quick interview answer

Test Eager vs Explicit Loading with unit checks for the happy path, integration tests for real I/O boundaries, and load/chaos checks so regressions show up before prod. Core idea: Mitigate first, then root-cause. Check symptoms against: Lazy loading enabled globally causing hidden N+1 in foreach..

Detailed answer

Interview answer for testing Eager vs Explicit Loading: 1) Unit: isolate the pure logic behind Eager vs Explicit Loading with deterministic fixtures. 2) Integration: exercise real timers/I/O/network boundaries the way production does. 3) Load & soak: prove the event path still meets SLOs under concurrency. 4) Failure injection: break dependencies and assert recovery/backpressure. Best practices to include: Prefer Select projection DTOs; AsSplitQuery for multiple collections. Call out mistakes: Lazy loading enabled globally causing hidden N+1 in foreach. Parent context: Mitigate first, then root-cause. Check symptoms against: Lazy loading enabled globally causing hidden N+1 in foreach..

Full explanation

Interviewers want a test strategy, not “I would write tests.” Tie each layer back to how Eager vs Explicit Loading fails: correctness, latency, and starvation. Include/ThenInclude eager-loads related data in one query. Explicit loading: reference/load after query. Avoid lazy loading in web apps (N+1 in loops).

Follow-up questions

Only answered follow-ups are shown — click to open with full answers

Parent context — Eager vs Explicit Loading

Mitigate first, then root-cause. Check symptoms against: Lazy loading enabled globally causing hidden N+1 in foreach..

View full parent question →

#ef-eager-lazy-loading#manager