[Solved] Given this LoggingInterceptor code snippet, what will be logged when a request is handled? intercept(context, next) { const now = Date.now(); return next.handle().pipe( tap(() => console.... | NestJS

NestJS - Interceptors

Given this LoggingInterceptor code snippet, what will be logged when a request is handled?

intercept(context, next) {
  const now = Date.now();
  return next.handle().pipe(
    tap(() => console.log(`Request took ${Date.now() - now}ms`))
  );
}

ALogs the time taken to process the request in milliseconds

BLogs the request URL only

CLogs the response body content

DLogs an error message if the request fails

Step-by-Step Solution

Solution:

Step 1: Analyze the timing logic
The code records the current time before the request is handled, then logs the difference after the response is sent.
Step 2: Understand the logged message
The console.log outputs "Request took Xms" where X is the elapsed time in milliseconds.
Final Answer:
Logs the time taken to process the request in milliseconds -> Option A
Quick Check:
LoggingInterceptor measures request duration [OK]

Quick Trick: Look for Date.now() difference to find elapsed time [OK]

Common Mistakes:

Assuming it logs request URL or body
Thinking it logs errors only
Ignoring the timing calculation

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More NestJS Quizzes

Given this LoggingInterceptor code snippet, what will be logged when a request is handled?

Step 1: Analyze the timing logic

Step 2: Understand the logged message

Final Answer:

Quick Check:

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