Cloud Functions setup in Firebase - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to initialize Firebase Cloud Functions.

Firebase

const functions = require('firebase-functions');
const admin = require('[1]');

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Afirebase-admin

Bfirebase-functions

Cfirebase-tools

Dfirebase

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'firebase-functions' instead of 'firebase-admin'.

Using 'firebase-tools' which is for CLI, not code.

The firebase-admin package is used to initialize admin SDK for Cloud Functions.

2fill in blank

medium

Complete the code to export a simple HTTP Cloud Function named 'helloWorld'.

Firebase

exports.helloWorld = functions.[1].onRequest((request, response) => {
  response.send('Hello from Firebase!');
});

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Afirestore

Bhttps

Cstorage

Dauth

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'firestore' or 'storage' which are for database or file triggers.

Using 'auth' which is for authentication triggers.

The https namespace is used to create HTTP triggered Cloud Functions.

3fill in blank

hard

Fix the error in the code to initialize the Firebase Admin SDK.

Firebase

admin.[1]();

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AinitApp

BstartApp

CcreateApp

DinitializeApp

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'initApp' or 'startApp' which are not valid methods.

Using 'createApp' which is from other frameworks.

The correct method to initialize the admin SDK is initializeApp().

4fill in blank

hard

Fill both blanks to create a Firestore triggered Cloud Function that runs on document creation.

Firebase

exports.newUser = functions.firestore.document('[1]').[2]((snap, context) => {
  const newValue = snap.data();
  return null;
});

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Ausers/{userId}

BonUpdate

ConCreate

DonDelete

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'onUpdate' or 'onDelete' which trigger on other events.

Using a path without a wildcard.

The function triggers on new documents created in the 'users/{userId}' path using onCreate.

5fill in blank

hard

Fill all three blanks to create a scheduled Cloud Function that runs every day at midnight.

Firebase

exports.dailyJob = functions.pubsub.schedule('[1]').timeZone('[2]').onRun((context) => {
  console.log('[3]');
  return null;
});

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Aevery 24 hours

BAmerica/New_York

CDaily job executed

Devery day at midnight

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'every 24 hours' which is valid but less clear than 'every day at midnight'.

Using incorrect timezone strings.

Logging unclear messages.

The schedule string for midnight is every day at midnight, the timezone is set to America/New_York, and the log message confirms the job ran.