30 NestJS Interview Questions and Answers (2026)
30 NestJS interview questions with full answers: modules, DI, guards, pipes, interceptors, JWT auth, microservices, and testing. Updated for 2026.
31 min readZeeshan Tofiq
Node.js
4 articles
Server-side Node.js, with an emphasis on the ORM and type boundaries where most runtime errors originate. Coverage includes migrating to Mongoose 9 and the breaking changes that migration surfaces, modelling Mongoose schemas with TypeScript interfaces so document types stay accurate, and extended interview preparation for both Node.js and NestJS. Examples are written as complete files rather than fragments, so the imports, types, and configuration that make them compile are visible.
30 Node.js Interview Questions and Answers (2026)
30 Node.js interview questions with full answers: event loop, streams, clustering, worker threads, memory leaks, and security. Updated for 2026.
37 min readZeeshan Tofiq
Mongoose 9 Migration Guide: What Actually Breaks in a Real MERN App
Upgrading to Mongoose 9? Here's what actually breaks in real MERN apps: pre-save hooks, plugins, TypeScript types, and how to fix each one.
12 min readZeeshan Tofiq
Mongoose and TypeScript: How to Type Your Models Without Writing Everything Twice
How to type Mongoose schemas in TypeScript without duplicating interfaces, using InferSchemaType, HydratedDocument, and the populate() fix nobody explains.
15 min readZeeshan Tofiq