What is the difference between UseGuards, UseInterceptors, UsePipes, and UseFilters — can they all be applied at the same levels?

All four decorators can be applied at method level, controller (class) level, or globally. The key execution-order difference is that guards, interceptors, and pipes run global → controller → method, while exception filters resolve method → controller → global with the most specific filter winning.

All four applied at all three binding levels

Execution order summary:

1
Guards — global → controller → method. All must pass for the request to continue.
2
Interceptors — global → controller → method (pre). Method → controller → global (post).
3
Pipes — global → controller → method. Each processes its bound parameter.
4
Filters — method → controller → global. First matching @Catch() type wins.
5
app.useGlobal*() registers without DI support; APP_* tokens register with full DI.