Supabase vs Firebase comparison - Practice Questions

Challenge - 5 Problems

🧠 Conceptual

intermediate

Primary Database Technology Used

Which database technology does Supabase primarily use compared to Firebase?

A Both Supabase and Firebase use the same NoSQL database.

B Supabase uses MySQL, while Firebase uses PostgreSQL.

C Supabase uses PostgreSQL, while Firebase uses a NoSQL database.

D Supabase uses Firebase's Realtime Database under the hood.

💡 Hint

Think about the type of database each platform is built on.

Supabase is built on PostgreSQL, a relational database, while Firebase uses NoSQL databases like Firestore and Realtime Database.

❓ Architecture

intermediate

Real-time Data Synchronization

Which platform provides built-in real-time data synchronization capabilities without additional setup?

A Firebase provides built-in real-time synchronization; Supabase requires additional configuration.

B Supabase provides built-in real-time synchronization; Firebase requires additional setup.

C Neither platform supports real-time synchronization.

D Both platforms require third-party tools for real-time synchronization.

💡 Hint

Consider which platform is known for easy real-time updates out of the box.

Firebase's Realtime Database and Firestore offer real-time data sync by default. Supabase supports real-time but needs configuration.

❓ security

advanced

Authentication and Authorization Features

Which statement correctly describes the authentication and authorization features of Supabase compared to Firebase?

A Both platforms rely solely on third-party authentication providers without native support.

B Supabase uses JWT tokens and Row Level Security policies; Firebase uses proprietary token-based auth with rules.

C Supabase does not support user authentication; Firebase does.

D Firebase uses SQL-based access control; Supabase uses OAuth only.

💡 Hint

Think about how each platform manages database access and user identity.

Supabase uses JWT tokens and PostgreSQL Row Level Security for fine-grained access. Firebase uses its own token system and security rules.

✅ Best Practice

advanced

Choosing Between Supabase and Firebase for a New Project

For a project requiring complex relational queries and SQL support, which platform is better suited?

A Supabase, because it supports SQL and relational data natively.

B Firebase, because it has built-in SQL query support.

C Neither, both platforms only support NoSQL queries.

D Firebase, because it automatically converts NoSQL to SQL.

💡 Hint

Consider which platform uses a relational database.

Supabase uses PostgreSQL, which supports complex SQL queries and relational data. Firebase uses NoSQL databases without native SQL support.

❓ service_behavior

expert

Handling Offline Data Synchronization

Which platform offers built-in offline data synchronization for mobile apps, and how does it behave when the device reconnects?

A Supabase queues offline changes but requires manual sync triggers.

B Supabase offers built-in offline sync with automatic conflict resolution.

C Neither platform supports offline sync; developers must implement it manually.

D Firebase offers built-in offline sync; it queues changes locally and syncs automatically when online.

💡 Hint

Think about mobile app support and offline capabilities.

Firebase SDKs support offline data persistence and automatic synchronization when connectivity returns. Supabase currently lacks built-in offline sync.

Practice

1. Which database type does Supabase primarily use?

easy

A. SQL (relational database)

B. NoSQL (document database)

C. Graph database

D. Key-value store

Solution

1. Step 1: Understand Supabase database type

   Supabase is built on PostgreSQL, which is a relational SQL database.

2. Step 2: Compare with other database types

   Unlike NoSQL or graph databases, Supabase uses structured tables and SQL queries.

3. Final Answer:

   SQL (relational database) -> Option A

4. Quick Check:

   Supabase = SQL database [OK]

Hint: Supabase uses SQL, Firebase uses NoSQL [OK]

Common Mistakes:

• Confusing Supabase with NoSQL databases
• Thinking Supabase uses Firebase's database type
• Assuming Supabase is a key-value store

2. Which of the following is a correct statement about Firebase?

easy

A. Firebase is managed by Google and uses NoSQL

B. Firebase is open-source and uses SQL

C. Firebase requires manual server setup

D. Firebase only supports relational databases

Solution

1. Step 1: Identify Firebase management and database type

   Firebase is a Google-managed platform that uses NoSQL databases like Firestore.

2. Step 2: Eliminate incorrect options

   Firebase is not open-source, does not use SQL, and does not require manual server setup.

3. Final Answer:

   Firebase is managed by Google and uses NoSQL -> Option A

4. Quick Check:

   Firebase = Google-managed NoSQL [OK]

Hint: Firebase = Google-managed + NoSQL [OK]

Common Mistakes:

• Thinking Firebase is open-source
• Assuming Firebase uses SQL
• Believing Firebase needs manual server setup

3. Given a project requiring complex SQL queries and relational data, which platform is better suited?

medium

A. Firebase, because it supports SQL queries natively

B. Firebase, because it is open-source

C. Supabase, because it uses PostgreSQL with SQL support

D. Supabase, because it uses NoSQL for flexibility

Solution

1. Step 1: Analyze project needs for complex SQL and relational data

   Complex SQL queries and relational data require a relational database with SQL support.

2. Step 2: Match platform capabilities

   Supabase uses PostgreSQL, a relational SQL database, making it suitable. Firebase uses NoSQL and does not support SQL natively.

3. Final Answer:

   Supabase, because it uses PostgreSQL with SQL support -> Option C

4. Quick Check:

   Relational + SQL = Supabase [OK]

Hint: Relational + SQL = Supabase choice [OK]

Common Mistakes:

• Choosing Firebase for SQL support
• Confusing open-source status
• Assuming Supabase uses NoSQL

4. You try to write a SQL query in Firebase's Firestore database and get an error. What is the likely cause?

medium

A. You need to use Firebase CLI to run SQL queries

B. Your SQL syntax is incorrect

C. Firestore requires a special SQL mode enabled

D. Firestore does not support SQL queries; it uses NoSQL syntax

Solution

1. Step 1: Understand Firestore query language

   Firestore is a NoSQL database and does not support SQL queries; it uses its own query syntax.

2. Step 2: Identify why SQL query fails

   Trying to run SQL in Firestore causes errors because SQL is not supported at all, not due to syntax or CLI issues.

3. Final Answer:

   Firestore does not support SQL queries; it uses NoSQL syntax -> Option D

4. Quick Check:

   Firestore = NoSQL, no SQL queries [OK]

Hint: Firestore uses NoSQL, not SQL queries [OK]

Common Mistakes:

• Assuming SQL syntax error instead of unsupported query
• Thinking Firestore has SQL mode
• Believing Firebase CLI runs SQL queries

5. You want to build a real-time chat app with easy setup and tight integration with Google services. Which platform fits best and why?

hard

A. Supabase, because it is open-source and uses SQL

B. Firebase, because it offers real-time database and Google ecosystem integration

C. Supabase, because it supports NoSQL and Google Cloud Functions

D. Firebase, because it requires manual server management

Solution

1. Step 1: Identify requirements for real-time chat and Google integration

   Real-time updates and easy Google service integration are key for this app.

2. Step 2: Match platform features

   Firebase provides a real-time database and is tightly integrated with Google Cloud services, making setup easier.

3. Step 3: Eliminate incorrect options

   Supabase is open-source and SQL-based but less integrated with Google. Firebase does not require manual server management.

4. Final Answer:

   Firebase, because it offers real-time database and Google ecosystem integration -> Option B

5. Quick Check:

   Real-time + Google integration = Firebase [OK]

Hint: Real-time + Google = Firebase best choice [OK]

Common Mistakes:

• Choosing Supabase for Google integration
• Thinking Firebase needs manual servers
• Confusing database types for chat apps