[Solved] Find the mistake in this interceptor implementation:import { Injectable, NestInterceptor, ExecutionContext, CallHandler } from '@nestjs/common'; import { Observable } from 'rxjs';... | NestJS

NestJS - Interceptors

Find the mistake in this interceptor implementation:

import { Injectable, NestInterceptor, ExecutionContext, CallHandler } from '@nestjs/common';
import { Observable } from 'rxjs';

@Injectable()
export class LoggingInterceptor implements NestInterceptor {
  intercept(context: ExecutionContext, next: CallHandler): Observable {
    console.log('Request started');
    return next.handle();
  }
}

ANo error; code is correct

BNo return type declared for intercept method

CInterceptor class missing @Injectable decorator

DMissing pipe operator to handle response

Step-by-Step Solution

Solution:

Step 1: Check for required decorators
The class has @Injectable decorator, which is correct.
Step 2: Verify method signature and return
intercept returns Observable and calls next.handle(), which is valid.
Final Answer:
No error; code is correct -> Option A
Quick Check:
Basic interceptor with logging is valid as is [OK]

Quick Trick: Basic interceptors can just return next.handle() [OK]

Common Mistakes:

Thinking pipe is mandatory
Missing @Injectable decorator
Incorrect method return type

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Find the mistake in this interceptor implementation:

Step 1: Check for required decorators

Step 2: Verify method signature and return

Final Answer:

Quick Check:

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