Interview questions
Database Administrator interview questions
52 realistic questions across technical, behavioural, HR, situational and role-specific categories. Questions only — join free to unlock model answers, quizzes and AI mock interviews.
Showing 25 of 52 questions
How would you decide between using a foreign key constraint versus application-level logic to enforce referential integrity?
Technical
Beginner
Q1
How would you design a REST API for a high-traffic feature that requires returning a list of items with pagination, filtering, and sorting, while minimizing database load?
Technical
Intermediate
Q2
How would you diagnose and fix a slow database query that suddenly started taking 10 seconds instead of 100 milliseconds?
Technical
Intermediate
Q3
How would you keep a page fast when traffic spikes, specifically by optimizing the database layer?
Technical
Advanced
Q4
How would you secure an API against unauthorised access, specifically by protecting the database from injection attacks and data leaks?
Technical
Advanced
Q5
How do you decide what to unit test versus integration test when dealing with database-related code?
Technical
Intermediate
Q6
How would you prevent a race condition when two users update the same record in a distributed database system?
Technical
Advanced
Q7
Walk me through deploying a database schema change to a production database with zero downtime.
Technical
Advanced
Q8
How would you implement ACID properties and choose the appropriate transaction isolation level to prevent data anomalies in a multi-user database environment?
Technical
Intermediate
Q257
How would you analyze and improve query performance by selecting and implementing the right indexing strategies for a slow-running report query?
Technical
Intermediate
Q258
Tell me how you would approach Backup, Recovery, and Point-in-Time Restore.
Role Specific
Intermediate
Q259
How would you design a high availability and disaster recovery architecture for a critical production database to minimize downtime and data loss?
System Design
Advanced
Q260
What would you do if you had to deal with Database Security: Authentication, Authorization, and Encryption at short notice?
Role Specific
Intermediate
Q261
How would you use wait statistics to identify and troubleshoot performance bottlenecks on a SQL Server instance?
Technical
Advanced
Q262
What would you do if you faced this situation: Handling a Production Outage: Incident Response and Communication?
Situational
Intermediate
Q263
How would you plan database capacity and implement scaling strategies to support expected user growth over the next year?
System Design
Advanced
Q264
Tell me about a time you demonstrated Conflict Resolution and Stakeholder Management for DBAs.
Behavioral
Intermediate
Q265
Give an example of how you have applied Automation and Scripting for Database Administration in your work.
Professional Specific
Intermediate
Q266
Can you walk me through how you would implement indexing strategies and optimize queries to improve the performance of a frequently used transaction?
Technical
Intermediate
Q267
A colleague is struggling with understanding ACID transactions and isolation levels; how would you explain and demonstrate their practical use in ensuring data consistency?
Technical
Advanced
Q268
Can you describe a situation where your backup and recovery strategy, including RPO and RTO considerations, directly impacted the resolution of a data loss incident?
Technical
Intermediate
Q269
How would you decide between synchronous and asynchronous replication for a database system requiring both data consistency and performance?
Technical
Advanced
Q270
What would you do if you faced this situation: Handling a Production Database Outage?
Situational
Intermediate
Q271
Why Do You Want to Be a DBA?
HR Screening
Beginner
Q272
How would you design the database schema and indexing strategy to efficiently support a social media feed with real-time updates and high user concurrency?
System Design
Expert
Q273
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