Database Administrator interview questions & mock practice
A Database Administrator interview in 2026 runs across 4 rounds — dbms fundamentals, administration round, performance tuning, ha & scenario. Below are the most-asked Database Administrator interview questions and a focused prep plan. Rehearse every answer with OnJob's free AI mock interview and get instant, specific feedback before the real one.
The Database Administrator interview process
Database administration, backups, performance tuning and high availability — the DBA interview for enterprises, banks and data-heavy teams.
DBMS fundamentals
Architecture, ACID, indexing and normalisation.
Administration round
Backups, recovery, users, roles and security.
Performance tuning
Query optimisation, execution plans and indexing strategy.
HA & scenario
Replication, clustering and a recovery scenario.
Most-asked Database Administrator interview questions
12 of the questions Database Administrator candidates are asked most often in India. Practise answering each one out loud in your AI mock interview.
- 1. What are the ACID properties of a transaction?
- 2. Explain the difference between clustered and non-clustered indexes.
- 3. What is the difference between a full, differential and incremental backup?
- 4. How do you recover a database to a point in time?
- 5. What is database normalisation, and when would you denormalise?
- 6. Explain transaction isolation levels and what problems each prevents.
- 7. What is a deadlock, and how do you detect and resolve it?
- 8. How do you identify and fix a slow-running query?
- 9. What is replication, and what is the difference between synchronous and asynchronous replication?
- 10. How do you manage users, roles and permissions in a database?
- 11. What is the difference between DELETE, TRUNCATE and DROP?
- 12. How do you monitor database health and plan for capacity?
How to prepare for your Database Administrator interview
Know DBMS internals: indexing (clustered vs non-clustered), ACID, isolation levels and how the optimiser works.
Be confident on backup and recovery strategies — full/differential/incremental and point-in-time recovery.
Practice performance tuning: reading execution plans, spotting missing indexes and rewriting slow queries.
Understand high availability: replication, log shipping, clustering and failover.
Be ready for a recovery scenario and know your platform (Oracle, SQL Server, MySQL or PostgreSQL) well.
Practise other roles
- Software Engineer
- Frontend Developer
- Backend Developer
- Full Stack Developer
- Data Analyst
- Data Scientist
- Product Manager
- DevOps Engineer
- Java Developer
- Python Developer
- UI/UX Designer
- Sales / Business Development
- Digital Marketing
- HR / Recruiter
- Accountant
- Customer Support
- Data Engineer
- Machine Learning Engineer
- QA / Test Engineer
- Android Developer
- iOS Developer
- Business Analyst
- Project Manager
- Scrum Master
- SQL Developer
- React Developer
- Node.js Developer
- Cloud Engineer (AWS)
- Cybersecurity Analyst
- Network Engineer
- SEO Specialist
- Content Writer
- Graphic Designer
- Sales Executive
- Business Development Manager
- Operations Manager
- Financial Analyst
- Chartered Accountant
- Customer Success Manager
- Technical Support Engineer
- Civil Engineer
Interview prep guides
Database Administrator interview — FAQs
What questions are asked in a Database Administrator interview?
Common Database Administrator interview questions include: What are the ACID properties of a transaction? Explain the difference between clustered and non-clustered indexes. What is the difference between a full, differential and incremental backup? How do you recover a database to a point in time? Interviews usually run across 4 rounds — DBMS fundamentals, Administration round, Performance tuning, HA & scenario. Practice all of them with instant AI feedback using OnJob's free mock interview.
How many rounds are in a Database Administrator interview?
A typical Database Administrator interview has 4 rounds: DBMS fundamentals (Architecture, ACID, indexing and normalisation.); Administration round (Backups, recovery, users, roles and security.); Performance tuning (Query optimisation, execution plans and indexing strategy.); HA & scenario (Replication, clustering and a recovery scenario.).
How do I prepare for a Database Administrator interview?
To prepare for a Database Administrator interview: Know DBMS internals: indexing (clustered vs non-clustered), ACID, isolation levels and how the optimiser works. Be confident on backup and recovery strategies — full/differential/incremental and point-in-time recovery. Practice performance tuning: reading execution plans, spotting missing indexes and rewriting slow queries. Then run a full AI mock interview on OnJob to rehearse out loud and get instant, specific feedback before the real thing.
What skills do I need for a Database Administrator role?
Core Database Administrator skills tested in interviews include SQL, Database Administration, Backup & Recovery, Performance Tuning, Indexing, Replication, Oracle / MySQL. OnJob shows you exactly which of these skills stand between you and a 100% match on every live Database Administrator job.
Is OnJob's Database Administrator mock interview free?
Yes. OnJob's AI mock interview is free to start (₹0) and gives you instant feedback on your answers. Pro (₹99/month) adds unlimited interview-prep AI alongside recruiter tracking and unlimited applications.
Ace your Database Administrator interview
Rehearse every Database Administrator question out loud with OnJob's AI mock interview and get instant, specific feedback. Then apply to AI-matched jobs in one click — free to start.
Everything about Database Administrator on OnJob
Move across the whole Database Administrator topic — live openings, real salary data, the job description, interview prep, and early-career routes — all in one place.