[Solved] You want to secure a NestJS API route so only logged-in users can access it. Which combination correctly applies authentication and explains why it secures the API? Options:... | NestJS

NestJS - Authentication

You want to secure a NestJS API route so only logged-in users can access it. Which combination correctly applies authentication and explains why it secures the API? Options: A) Use @UseGuards(AuthGuard('jwt')) to check user identity before route access, preventing strangers. B) Use @UseInterceptors(AuthInterceptor) to log requests, which blocks unauthorized users. C) Use @UseFilters(AuthFilter) to catch errors, which stops unauthorized access. D) Use @UsePipes(AuthPipe) to validate data, which ensures only valid users access the route.

AUse @UsePipes(AuthPipe) to validate data, which ensures only valid users access the route.

BUse @UseInterceptors(AuthInterceptor) to log requests, which blocks unauthorized users.

CUse @UseFilters(AuthFilter) to catch errors, which stops unauthorized access.

DUse @UseGuards(AuthGuard('jwt')) to check user identity before route access, preventing strangers.

Step-by-Step Solution

Solution:

Step 1: Identify the correct NestJS feature for authentication
Guards are designed to control access by checking user identity before route execution.
Step 2: Understand why guards secure APIs
Using @UseGuards(AuthGuard('jwt')) ensures only authenticated users with valid JWT tokens can access the route, blocking strangers.
Final Answer:
Use @UseGuards(AuthGuard('jwt')) to check user identity before route access, preventing strangers. -> Option D
Quick Check:
Guards + AuthGuard('jwt') = Secure API access [OK]

Quick Trick: Use guards with AuthGuard('jwt') to secure routes [OK]

Common Mistakes:

Confusing interceptors, filters, or pipes with authentication guards
Thinking logging or error handling blocks unauthorized users
Assuming data validation equals authentication

Master "Authentication" in NestJS

9 interactive learning modes - each teaches the same concept differently

Learn Why Deep Visual Try Challenge Project Recall Perf

More NestJS Quizzes

Which combination correctly applies authentication and explains why it secures the API?

Step 1: Identify the correct NestJS feature for authentication

Step 2: Understand why guards secure APIs

Final Answer:

Quick Check:

Want More Practice?