[Solved] Find the bug in this code snippet:import http from 'http'; const server = http.createServer((req, res) => { res.writeHead(200, {'Content-Type': 'text/plain'}); res.end(); res.end('Hello'); }); server.... | Node.js

Node.js - HTTP Module

Find the bug in this code snippet:

import http from 'http';
const server = http.createServer((req, res) => {
  res.writeHead(200, {'Content-Type': 'text/plain'});
  res.end();
  res.end('Hello');
});
server.listen(8080);

AServer.listen port 8080 is invalid

BMissing res.write before res.end

CContent-Type should be application/json

DCalling res.end twice causes an error

Step-by-Step Solution

Solution:

Step 1: Review res.end usage
res.end ends the response; calling it twice is invalid and causes errors.
Step 2: Check other parts
res.write is optional before res.end, Content-Type is valid, and port 8080 is valid.
Final Answer:
Calling res.end twice causes an error -> Option D
Quick Check:
res.end called once only = D [OK]

Quick Trick: Call res.end only once per response [OK]

Common Mistakes:

Calling res.end multiple times
Thinking res.write is mandatory
Confusing Content-Type values

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More Node.js Quizzes

Find the bug in this code snippet:

Step 1: Review res.end usage

Step 2: Check other parts

Final Answer:

Quick Check:

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