Fundamentals of Firebase Realtime Database Quiz

1. Database Structure Basics

   Which data format is primarily used to store and organize data in a Firebase Realtime Database?

   1. SQL
   2. JSON
   3. CSV
   4. XML
   5. YAML

2. Data Synchronization

   What feature of Firebase Realtime Database allows updates to be reflected in real time across all connected devices?

   1. Deferred Sync
   2. Batch Upload
   3. Live Update
   4. Real-time Synchronization
   5. Snapshot Sync

3. Setting Data

   If you use the 'set' method on a specific database path, what happens to the data at that location?

   1. It appends the data
   2. It merges data
   3. It overwrites the data
   4. It archives the data
   5. It renames the data

4. Database URL

   Which part of a Firebase Realtime Database URL identifies the root location of the database?

   1. User ID
   2. Node Key
   3. Database URL
   4. Reference Path
   5. Data Tree

5. Reading Data

   When using a listener to read data, which event type triggers whenever data at a reference changes?

   1. onError
   2. onRead
   3. onSync
   4. value
   5. onReload

6. Data Security

   What rules system can you use in Firebase Realtime Database to control read and write access to your data?

   1. Access Tokens
   2. Database Roles
   3. Security Rules
   4. Private Keys
   5. Session Codes

7. Pushing Data

   Which method is typically used to add a new child with a unique key under a collection in the database?

   1. push
   2. addNode
   3. insertChild
   4. createKey
   5. expand

8. Offline Capabilities

   What happens if a client writes data to the Firebase Realtime Database while offline?

   1. The write fails immediately
   2. Data is discarded
   3. The write is queued and synced when online
   4. An error is returned to the client
   5. A warning message is displayed

9. Data Retrieval

   If you want to retrieve data only once without listening for changes, which method should you use?

   1. subscribe
   2. once
   3. listen
   4. snapshot
   5. stream

10. Database Keys

    In the context of Firebase Realtime Database, what is a key?

    1. A data value
    2. A permission token
    3. The unique identifier for a node in the database
    4. An admin password
    5. The server timestamp