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What is the main purpose of a LoggingInterceptor in a NestJS application?

easy📝 Conceptual Q11 of 15
NestJS - Interceptors
What is the main purpose of a LoggingInterceptor in a NestJS application?
ATo manage user authentication and authorization
BTo handle database connections automatically
CTo log details about incoming requests and outgoing responses
DTo serve static files like images and CSS
Step-by-Step Solution
Solution:

  1. Step 1: Understand the role of interceptors

    Interceptors in NestJS run code before and after request handlers, often used for logging or modifying requests/responses.

  2. Step 2: Identify the purpose of LoggingInterceptor

    A LoggingInterceptor specifically tracks and logs request and response details for debugging and monitoring.

  3. Final Answer:

    To log details about incoming requests and outgoing responses -> Option C

  4. Quick Check:

    LoggingInterceptor = logs requests/responses [OK]
Quick Trick: LoggingInterceptor logs request and response info [OK]
Common Mistakes:
  • Confusing interceptors with middleware
  • Thinking interceptors handle authentication
  • Assuming interceptors serve static files

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