Facebook sign-in in Firebase - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is Facebook sign-in in Firebase?

Facebook sign-in in Firebase allows users to log into your app using their Facebook account, making login easy and secure without creating a new password.

beginner

Which Firebase service handles Facebook sign-in?

Firebase Authentication handles Facebook sign-in by connecting your app with Facebook's login system and managing user sessions.

intermediate

What do you need to set up before enabling Facebook sign-in in Firebase?

You need a Facebook Developer account, create a Facebook app, get the App ID and App Secret, and configure these in Firebase console under Authentication providers.

intermediate

How does Firebase use the Facebook access token during sign-in?

Firebase uses the Facebook access token to verify the user's identity with Facebook and then creates a Firebase user session based on that verification.

advanced

What is a common error when Facebook sign-in fails in Firebase?

A common error is misconfigured OAuth redirect URIs or incorrect Facebook App ID/Secret, which prevents Firebase from verifying the Facebook login.

What is the first step to enable Facebook sign-in in Firebase?

A Create a Facebook app and get App ID and Secret

B Write code to handle Facebook login

C Deploy Firebase project

D Create a Google Cloud project

You must first create a Facebook app to get the App ID and Secret before configuring Firebase.

Which Firebase feature manages Facebook sign-in?

A Firebase Authentication

B Firebase Firestore

C Firebase Hosting

D Firebase Functions

Firebase Authentication manages user sign-in including Facebook sign-in.

What does Firebase use to verify a Facebook user during sign-in?

A User email

B Firebase API key

C Facebook access token

D OAuth redirect URI

Firebase uses the Facebook access token to verify the user's identity.

Where do you configure Facebook App ID and Secret for Firebase sign-in?

A Firebase Realtime Database

B Firebase Storage

C Firebase Cloud Messaging

D Firebase Authentication providers settings

Facebook App ID and Secret are configured in Firebase Authentication providers.

What is a common cause of Facebook sign-in failure in Firebase?

A Incorrect Firebase project name

B Misconfigured OAuth redirect URI

C Missing Firebase API key

D No internet connection

Misconfigured OAuth redirect URI often causes Facebook sign-in failures.

Explain the steps to set up Facebook sign-in in Firebase from scratch.

Think about what you need on Facebook and Firebase sides before coding.

Describe how Firebase uses the Facebook access token during the sign-in process.

Focus on token flow and verification.