Public NestJS challenges shared by the EraCode community. These pages are teasers — skill maintenance starts when you attempt the full problem inside EraCode.
Security/validation micro-practice: prevent mass-assignment by rejecting requests that include properties not defined in your DTO.
You’ll answer one advanced conceptual question about numeric validation in NestJS, then fill a single missing piece in a custom pipe that parses a route param into a finite number with bounds.