Promise Chaining Challenge

Promise Chaining Challenge

Assessment

Interactive Video

Information Technology (IT), Architecture

University

Hard

Created by

Quizizz Content

FREE Resource

The video tutorial covers advanced promise chaining in JavaScript, starting with a review of basic promises and moving to more complex scenarios. It demonstrates how to simulate asynchronous operations using setTimeout and highlights the drawbacks of nested promises. The tutorial then introduces promise chaining as a solution to simplify code and reduce complexity. Finally, it applies promise chaining in a practical example using Mongoose in a task manager app, addressing deprecation warnings and demonstrating real-world applications.

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10 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main advantage of using promise chaining over traditional promise handling?

It reduces the complexity of nested callbacks.

It eliminates the need for error handling.

It allows for synchronous code execution.

It increases the speed of asynchronous operations.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the basic promise setup, what is used to simulate an asynchronous delay?

setTimeout

setImmediate

setInterval

setAsync

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a key problem with nesting promises?

It requires more memory.

It makes the code run slower.

It leads to more complex and harder-to-read code.

It prevents error handling.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How does promise chaining improve code readability?

By using fewer lines of code.

By allowing multiple promises to be handled in a single line.

By eliminating the need for comments.

By avoiding nested callbacks and keeping the code flat.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the purpose of returning a promise from a 'then' callback?

To convert the promise to a synchronous operation.

To stop the execution of further promises.

To handle errors in the promise chain.

To allow chaining of another 'then' call.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the Mongoose example, what operation is performed after updating a user's age?

Fetching all users with a different age.

Counting all users with the same age.

Deleting the user.

Resetting the user's age.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which Mongoose method is used to count documents in the example?

aggregate

count

find

countDocuments

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