Promise chaining in Node.js - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a resolved promise.

Node.js

const promise = Promise.[1]('Done');

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Areject

Bresolve

Call

Drace

Attempts:

3 left

💡 Hint

Common Mistakes

Using reject instead of resolve

Using Promise.all or Promise.race incorrectly

The Promise.resolve() method creates a promise that is resolved with the given value.

2fill in blank

medium

Complete the code to add a handler for the resolved value.

Node.js

promise.[1](result => console.log(result));

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Athen

Bcatch

Cfinally

Dall

Attempts:

3 left

💡 Hint

Common Mistakes

Using catch instead of then

Using finally which runs regardless of outcome

The then method adds a callback for when the promise is fulfilled.

3fill in blank

hard

Fix the error in chaining a promise to handle rejection.

Node.js

promise.then(result => console.log(result)).[1](error => console.error(error));

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Athen

Bfinally

Ccatch

Dresolve

Attempts:

3 left

💡 Hint

Common Mistakes

Using then instead of catch for errors

Using finally which does not handle errors

The catch method handles promise rejections or errors.

4fill in blank

hard

Fill both blanks to chain two promises where the second depends on the first.

Node.js

fetchData().[1](data => processData(data)).[2](result => console.log(result));

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Athen

Bcatch

Cfinally

Dresolve

Attempts:

3 left

💡 Hint

Common Mistakes

Using catch or finally in place of then in the chain

Using resolve which is not a method on promises

Use then to chain promises and handle their results sequentially.

5fill in blank

hard

Fill all three blanks to create a promise chain with success, error, and cleanup handlers.

Node.js

getUser().[1](user => getProfile(user.id)).[2](error => console.error(error)).[3](() => console.log('Done'));

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

Athen

Bcatch

Cfinally

Dresolve

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up catch and finally

Using resolve which is not a chain method

The chain uses then for success, catch for errors, and finally for cleanup.