Database Administrator Interview Questions
A Database Administrator is the cornerstone of your company’s database security. They are responsible for monitoring systems, conducting analyses and developing solutions that improve your cybersecurity and respond to any issues that may arise. The ideal candidate will be familiar with database security protocol, recovery procedures and the most popular software in their industry.
A qualified Database Administrator will have a degree in computer science or engineering and at least two years of demonstrated experience managing databases. They must be logical and analytical, paying close attention to the small details that other IT professionals are prone to overlook. They also need strong communication skills in order to provide support to clients and staff. They will also be an avid learner who is always expanding their knowledge to ensure their practices meet the rapidly evolving industry standards.
General interview questions (such as “Can you tell me about yourself?” and “Why are you looking for another job?”) are a great way to get to know your candidate’s personal history, interests, and goals. However, be sure to add inquiries specific to the role they’re interviewing for, so you can gain valuable insights into their likelihood of success in that position.
Below are Database Administrator interview questions to help you get started:
1. Can you describe a database to an 8-year-old?
What you want to hear: Mastery of a subject means you have the ability to simplify it and explain its core principles with ease. A strong Database Administrator candidate will be able to easily state what a database is and what it does. The answer does not need to be overly technical or loaded with professional jargon that ultimately masks a true understanding of what their work entails.
2. What is the function of select in an SQL query?
What you want to hear: SQL stands for Structured Language Query, and it is the heart and soul of a Database Administrator’s job. The select command asks the database a question through the form of an SQL. Finding the right information quickly is critical, especially when working with large databases. Learning how to use select and ask the right question is imperative to performing database management.
Red flag: If a candidate doesn’t know much about SQLs, why they matter or how to use them properly, you could wind up with a highly inexperienced administrator who is unable to meet the demands of their job. Knowing definitions is not enough; they must be able to explain various processes and the reason behind them.
3. What is SQL injection and how do you prevent it?
What you want to hear: An SQL injection is a malicious type of SQL that prompts a database to provide unauthorized users with private information. The best prevention strategies include writing code with input validation, installing a firewall.
Red flag: A candidate who doesn’t know what an SQLI is can leave your company at risk. You need an administrator who can fortify your databases against potential threats just as well as they can quickly respond to attacks.
4. How would you move data from MySQL to Azure?
What you want to hear: Server migration requires precision and sequential thinking. An ideal answer will walk you through the process step by step. Utilizing Microsoft’s SQL Server Migration Assistant (SSMA) should be mentioned.
Red flag: Lack of working familiarity with major database servers limits a Database Administrator’s scope and capabilities. Although candidates may possess stronger experience with certain servers, they need to be comfortable transitioning to others and understand how to approach the migration process.
5. What is the difference between an offline and online backdrop?
What you want to hear: The candidate should provide a straightforward answer that explains an online backup method uses the internet while an offline method does not. They should also mention the main benefits of each, including online backups being accessible from anywhere and offline backups being faster.
Red flag: If a candidate cannot backup information or does not know how to protect a database, the company and all of its most sensitive information is at risk. Preventative maintenance includes backups that protect data in the event of damage or breaches.
6. Who do you call when you’re stuck on a problem at work?
What you want to hear: A good candidate will have former colleagues or mentors they’ve met throughout their career who they can rely on. If they’ve worked in database administration for years, it’s highly improbable that they haven’t met anyone or made some professional connections.
Red flag: Be wary of a candidate who cannot cite any past work experience or colleagues off the top of their head. At the least, they should be able to list some resources they use to troubleshoot problems.
7. Why did you choose this job?
What you want to hear: A candidate should be genuinely passionate about what they do. Personal reasons may vary, but this is an opportunity to see beyond the person’s resume and find out what motivates them.
8. How do you handle stress at work?
What you want to hear: An ideal candidate should be comfortable enough to admit their job comes with a great deal of pressure and confident enough to explain ways they personally manage it.
Red flag: Don’t believe any candidate who says they don’t get stressed at work. They either lack enough experience to have been genuinely challenged or they don’t value the honesty it takes to be open about their struggles.
9. What is the purpose of an SQL agent?
What you want to hear: A talented Database Administrator understands the importance of automation. An SQL agent ensures that routine backup and maintenance is performed on a schedule.
10. Can you tell me about your greatest professional achievement so far?
What you want to hear: A candidate who takes pride in their work will quickly be able to recall a moment that made them feel proud of their efforts. It may be finishing their degree, landing their first job, or being promoted to an administrator.
Every interview question can help get you closer to the right fit for your Database Administrator position.
Be sure to keep an eye out for candidates who:
- Have proven experience working in database management
- Are analytical thinkers, logical and understand the tools of the trade
- Care about their job and see it as more than just a set of functions