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Database Administrator (DBA) interview questionsProblem-solving Test round
A 60 min interview plan with a time-boxed script, what each question is for, and the signals to score against. Key skills: Problem Solving, Analytical Thinking, Troubleshooting, Performance Tuning, Deadlock Resolution.
Opening
· 5 minWho is interviewing, how the round will run, and a question to settle the candidate in. The standard openingProblem-Solving Challenge
What this part is for
Purpose
Evaluate technical knowledge and problem-solving skills in real-world scenarios.
Challenge: You are tasked with optimizing a slow-running query in a production database. The query involves multiple joins and aggregations on large tables. How would you approach diagnosing and resolving the performance issue?
What this question is for, and what to listen for
Purpose
Assess problem-solving, analytical thinking, troubleshooting, and performance tuning skills.
Signals to score
- Identifies potential bottlenecks
- Considers query execution plan
- Suggests indexing strategies
- Evaluates query structure
- Considers database configuration
- Proposes monitoring tools
- Tests changes effectively
- Communicates thought process clearly
Follow-up questions
- What tools would you use to analyze the query performance?
- How would you determine if indexing could help?
- Can you explain how you would test your optimizations?
If you had more time, what additional steps would you take to ensure the query remains optimized over time?
What this question is for, and what to listen for
Purpose
Assess the candidate's ability to reflect on their work, identify areas for improvement, and demonstrate critical thinking and problem-solving skills.
Signals to score
- Recognizes limits in their original answer.
- Points out clear areas to improve.
- Suggests specific changes.
- Talks about how changes could help performance.
- Shares ideas clearly and logically.
- Shows a desire to learn and improve.
Follow-up questions
- How would you ensure the query remains efficient as data grows?
- What strategies would you use for ongoing performance monitoring?
- Can you discuss any automation tools you might use?
Great job on the problem-solving challenge!
What this line is for
Purpose
Provides positive reinforcement to the candidate, helping to build confidence and create a supportive atmosphere before moving into the final part of the interview.
Closing
· 5 minTheir questions for you, and what happens next. The standard closingDatabase Administrator (DBA) interviews — common questions
- Who is this Database Administrator (DBA) interview plan for?
- It is written for the interviewer, not the candidate: the hiring manager, engineer or panel member running the Problem-solving Test round for a Database Administrator (DBA) role. It gives you a 60 min script to follow in the conversation — 2 questions with what each one is for and the signals to score against — so you are not writing the round from scratch the night before.
- What does the Problem-solving Test round assess?
- This round is focused on: Problem Solving, Analytical Thinking, Troubleshooting, Performance Tuning, Deadlock Resolution. It works through Problem-Solving Challenge, scoring against 14 observable signals, with follow-up prompts on both questions for going deeper where an answer is thin.
- How is the 60 min split up?
- 5 min opening, 50 min on 2 questions and 5 min closing. The questions take in Problem-Solving Challenge (50 min). The timings are there so the round stays on schedule and every candidate gets the same shape of interview — which is what makes two candidates comparable afterwards.
- What other rounds should I run for a Database Administrator (DBA)?
A single round does not cover a whole role. The other rounds in this library for a Database Administrator (DBA):
Hiring for this role?
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- Every interviewer runs the same script and marks the same signals.
- AI drafts the write-ups, and the debrief puts every read side by side.
- No ATS to set up first, and no bot in the call.
Free for your first open role.