Lesson 29 / 34
Interview Questions
Prepare for NestJS interviews on dependency injection, guards vs pipes vs interceptors, N+1 queries and architecture.
Core concepts Q&A
Explain: dependency injection, how modules work, the difference between providers and services, guard vs pipe vs interceptor, how middleware fits in.
Database & performance Q&A
Discuss: N+1 problem and solutions, lazy vs eager loading, migration strategy, caching trade-offs, query optimization.
Architecture Q&A
How would you structure a large app? Testing strategy? Authentication & authorization? Scaling considerations?