[Solved] Identify the error in this Express.js route that should return 404 for missing products:app.get('/products/:id', (req, res) => { const products = { '10': 'Table', '20': 'Chair' };... | Rest API

Rest API - HTTP Status Codes

Identify the error in this Express.js route that should return 404 for missing products:

app.get('/products/:id', (req, res) => {
  const products = { '10': 'Table', '20': 'Chair' };
  const product = products[req.params.id];
  if (product === undefined) {
    res.send(404, 'Product not found');
  } else {
    res.send(product);
  }
});

Ares.send(404, 'Product not found') is deprecated; use res.status(404).send()

BThe products object keys should be numbers, not strings

Creq.params.id should be converted to number before lookup

Dres.send() cannot send strings

Step-by-Step Solution

Solution:

Step 1: Check usage of res.send with status code
res.send(status, body) is deprecated in Express; status should be set with res.status()
Step 2: Correct way to send 404
Use res.status(404).send('Product not found') to set status and send message.
Final Answer:
res.send(404, 'Product not found') is deprecated; use res.status(404).send() -> Option A
Quick Check:
Use res.status(404).send() for 404 responses [OK]

Quick Trick: Use res.status(404).send() not res.send(404, ...) [OK]

Common Mistakes:

MISTAKES

Using deprecated res.send with status code
Not setting status code properly
Assuming string keys cause 404

Master "HTTP Status Codes" in Rest API

9 interactive learning modes - each teaches the same concept differently

Learn Why Deep Visual Try Challenge Project Recall Time

More Rest API Quizzes

Identify the error in this Express.js route that should return 404 for missing products:

Step 1: Check usage of res.send with status code

Step 2: Correct way to send 404

Final Answer:

Quick Check:

Want More Practice?