Why REST design principles matter in Node.js - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a simple GET endpoint using Express that returns a welcome message.

Node.js

app.[1]('/welcome', (req, res) => {
  res.send('Welcome to our API!');
});

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

Aget

Bput

Cpost

Ddelete

Attempts:

3 left

💡 Hint

Common Mistakes

Using POST instead of GET for retrieving data.

Confusing HTTP methods and their purposes.

The GET method is used to request data from a server. Here, it defines an endpoint that sends a welcome message.

2fill in blank

medium

Complete the code to parse JSON request bodies in Express using middleware.

Node.js

app.use([1].json());

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

Acors

BbodyParser

Crouter

Dexpress

Attempts:

3 left

💡 Hint

Common Mistakes

Using bodyParser which is deprecated in newer Express versions.

Trying to use unrelated middleware like cors.

Express has built-in middleware called express.json() to parse JSON bodies from incoming requests.

3fill in blank

hard

Fix the error in the route handler to correctly send a JSON response with a status code.

Node.js

app.get('/data', (req, res) => {
  res.status([1]).json({ message: 'Data fetched' });
});

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

A'OK'

B'200'

C200

Dtrue

Attempts:

3 left

💡 Hint

Common Mistakes

Passing status code as a string instead of a number.

Using status text like 'OK' instead of numeric code.

The status code should be a number, not a string. 200 means success.

4fill in blank

hard

Fill both blanks to create a RESTful route that updates a user by ID using the correct HTTP method and URL pattern.

Node.js

app.[1]('/users/[2]', (req, res) => {
  // update user logic
  res.send('User updated');
});

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

Aput

Bpost

C:id

DuserId

Attempts:

3 left

💡 Hint

Common Mistakes

Using POST instead of PUT for updates.

Using incorrect parameter names without colon.

PUT is used to update resources. The URL uses a parameter :id to specify which user to update.

5fill in blank

hard

Fill all three blanks to create a RESTful DELETE route that removes a product by its ID and sends a confirmation message.

Node.js

app.[1]('/products/[2]', (req, res) => {
  const productId = req.params.[3];
  // delete product logic
  res.send(`Product ${productId} deleted`);
});

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

Adelete

B:id

Cid

Dpost

Attempts:

3 left

💡 Hint

Common Mistakes

Using POST instead of DELETE.

Mismatching parameter names in URL and req.params.

DELETE method removes resources. The URL uses :id as a parameter. The handler accesses req.params.id to get the ID.