Why file storage is needed in Firebase - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to initialize Firebase Storage in your app.

Firebase

const storage = [1]();

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AgetStorage

BgetFirestore

CinitializeApp

DconnectStorageEmulator

Attempts:

3 left

💡 Hint

Common Mistakes

Using initializeApp instead of getStorage

Confusing Firestore with Storage

Trying to connect emulator before initializing storage

Use getStorage() to get the Firebase Storage instance for file storage operations.

2fill in blank

medium

Complete the code to upload a file to Firebase Storage.

Firebase

uploadBytes([1], file).then(() => console.log('Uploaded'));

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AauthRef

BstorageRef

CdatabaseRef

DfirestoreRef

Attempts:

3 left

💡 Hint

Common Mistakes

Using Firestore or database references instead of storageRef

Passing the file object as the reference

The uploadBytes function uploads a file to the given storage reference, which is storageRef.

3fill in blank

hard

Fix the error in the code to download a file URL from Firebase Storage.

Firebase

getDownloadURL([1]).then(url => console.log(url));

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AdatabaseRef

BauthRef

CfirestoreRef

DstorageRef

Attempts:

3 left

💡 Hint

Common Mistakes

Using Firestore or database references instead of storageRef

Passing an uninitialized variable

The getDownloadURL function requires a storage reference, so storageRef is correct.

4fill in blank

hard

Fill both blanks to create a reference to a file named 'image.png' in Firebase Storage.

Firebase

const [1] = ref([2], 'image.png');

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AstorageRef

Bstorage

Cfirestore

Ddatabase

Attempts:

3 left

💡 Hint

Common Mistakes

Using Firestore or database instead of storage

Mixing variable names

Use ref(storage, 'image.png') to create a reference to the file. Assign it to storageRef.

5fill in blank

hard

Fill all three blanks to delete a file named 'oldfile.txt' from Firebase Storage.

Firebase

const [1] = ref([2], '[3]');
deleteObject([1]).then(() => console.log('Deleted'));

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AfileRef

Bstorage

Coldfile.txt

DstorageRef

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong variable names

Passing wrong file name

Confusing storage and storageRef

Create a reference named fileRef using ref(storage, 'oldfile.txt'), then delete it with deleteObject(fileRef).