Top 30 Database Interview Questions to Crack FAANG

🚀 30 Most Asked Database Interview Questions – E-Book

Preparing for Backend, SDE-2, Senior Engineer, or FAANG-level interviews?

This e-book is built exactly for you.

Most candidates don’t fail interviews because of coding…

They fail because they don’t deeply understand databases, performance, and real-world data problems.

This book fixes that

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📘 What You’ll Get

No theory fluff. Only what actually gets asked.

Each question is designed to help you think like an interviewer expects:

• Why this concept matters in real interviews

• Clear, structured explanations

• Real-world examples (production scenarios)

• Trade-offs interviewers look for

• Common mistakes candidates make

• When to use what (decision clarity)

🔥 What’s Covered

🧠 Core Database Concepts

SQL vs NoSQL, Normalization vs Denormalization, Keys, Constraints, Data Integrity

⚙️ Performance & Query Optimization

Indexes (B-Tree, Hash, GIN, GiST), Query execution plans, Slow query optimization

💾 Transactions & Reliability

ACID properties, Transactions, Isolation levels, Deadlocks (and how to avoid them)

📦 Scaling & Architecture

Sharding vs Partitioning, Replication strategies, OLTP vs OLAP

🔗 Querying & Data Access

Joins (all types), INNER vs LEFT JOIN, N+1 problem

🔒 Concurrency Control

Database locking, Optimistic vs Pessimistic locking

🌍 Distributed Database Basics

CAP theorem, Eventual consistency

⚡ Production-Ready Practices

Migrations, Handling large data, Real-world debugging scenarios

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💰 Price: ₹99

Less than a coffee, but gives you a clear roadmap to crack database rounds in FAANG-level interviews.

If you’re serious about backend interviews, this will give you a strong edge.