Lesson 29 / 33
Interview Questions
Common NestJS questions and solutions for technical interviews.
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?