Status code conventions in Express - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to send a 200 OK status response in Express.

Express

app.get('/home', (req, res) => {
  res.status([1]).send('Welcome!');
});

Drag options to blanks, or click blank then click option'

A200

B404

C500

D301

Attempts:

3 left

💡 Hint

Common Mistakes

Using 404 or 500 which mean errors, not success.

The status code 200 means the request was successful and the server is sending the requested data.

2fill in blank

medium

Complete the code to send a 404 Not Found status when a resource is missing.

Express

app.get('/item/:id', (req, res) => {
  const item = findItem(req.params.id);
  if (!item) {
    res.status([1]).send('Item not found');
  }
});

Drag options to blanks, or click blank then click option'

A500

B403

C200

D404

Attempts:

3 left

💡 Hint

Common Mistakes

Using 200 which means success, or 500 which means server error.

404 means the requested resource was not found on the server.

3fill in blank

hard

Fix the error in the code to send a 201 Created status after a new user is added.

Express

app.post('/users', (req, res) => {
  addUser(req.body);
  res.status([1]).send('User created');
});

Drag options to blanks, or click blank then click option'

A400

B201

C200

D404

Attempts:

3 left

💡 Hint

Common Mistakes

Using 200 which means OK but not specifically creation.

201 status code means a new resource was successfully created on the server.

4fill in blank

hard

Fill both blanks to send a 400 Bad Request status with a JSON error message.

Express

app.post('/login', (req, res) => {
  if (!req.body.username) {
    res.status([1]).json({ error: '[2]' });
  }
});

Drag options to blanks, or click blank then click option'

A400

B401

CBad Request

DUnauthorized

Attempts:

3 left

💡 Hint

Common Mistakes

Using 401 which means unauthorized, not bad request.

400 status means the client sent a bad request. The message 'Bad Request' explains the error.

5fill in blank

hard

Fill all three blanks to send a 500 Internal Server Error with a JSON message and end the response.

Express

app.get('/data', (req, res) => {
  try {
    const data = getData();
    res.json(data);
  } catch (error) {
    res.status([1]).json({ message: '[2]' }).[3]();
  }
});

Drag options to blanks, or click blank then click option'

A400

BInternal Server Error

Cend

D500

Attempts:

3 left

💡 Hint

Common Mistakes

Using 400 which means client error, not server error.

500 means a server error occurred. The message explains it. Calling end() finishes the response.