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Software Engineer in Test (QA) interview questionsTechnical Interview round
A 60 min interview plan with a time-boxed script, what each question is for, and the signals to score against. Key skills: Testing Concepts, Automation, Test Strategies, Quality Assurance, Programming Skills.
Testing Concepts
10 min
What this section is for
Purpose
Assess understanding of fundamental testing concepts and methodologies.
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Can you explain the difference between black-box testing and white-box testing?
What this question is for, and what to listen for
Purpose
Evaluate understanding of testing methodologies.
Signals to score
- Clear distinction made
- Examples provided
- Understanding of use cases
- Knowledge of testing levels
- Explanation of tester's perspective
- Awareness of advantages
- Awareness of limitations
Follow-up questions
- How would you define black-box testing?
- Can you give an example of white-box testing?
•
What is regression testing and why is it important?
What this question is for, and what to listen for
Purpose
Assess knowledge of testing processes and importance.
Signals to score
- Definition provided
- Importance explained
- Examples of when used
- Mention of automation
- Understanding of impact
- Awareness of challenges
- Knowledge of tools
Follow-up questions
- Can you describe a scenario where regression testing is crucial?
- How does automation play a role in regression testing?
Automation
10 min
What this section is for
Purpose
Evaluate experience and knowledge in test automation.
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What tools have you used for test automation, and which one do you prefer?
What this question is for, and what to listen for
Purpose
Assess familiarity with automation tools and preferences.
Signals to score
- Tools mentioned
- Preference explained
- Experience shared
- Knowledge of tool features
- Understanding of tool limitations
- Examples of usage
- Adaptability to new tools
Follow-up questions
- What features do you look for in an automation tool?
- Can you share a project where you used your preferred tool?
•
How do you decide which tests to automate?
What this question is for, and what to listen for
Purpose
Assess decision-making skills in test automation.
Signals to score
- Criteria mentioned
- Examples provided
- Understanding of ROI
- Awareness of test stability
- Knowledge of test coverage
- Consideration of maintenance
- Strategic thinking
Follow-up questions
- What factors influence your decision to automate a test?
- Can you give an example of a test you chose not to automate?
Test Strategies and Quality Assurance
10 min
What this section is for
Purpose
Evaluate understanding of test strategies and QA processes.
•
How do you ensure test coverage and quality in your projects?
What this question is for, and what to listen for
Purpose
Assess strategies for maintaining test coverage and quality.
Signals to score
- Strategies mentioned
- Tools used
- Examples of implementation
- Understanding of metrics
- Awareness of challenges
- Knowledge of best practices
- Continuous improvement mindset
Follow-up questions
- What metrics do you use to measure test coverage?
- Can you describe a challenge you faced in ensuring quality?
•
Describe a time when you identified a critical bug. How did you handle it?
What this question is for, and what to listen for
Purpose
Assess problem-solving and critical thinking skills.
Signals to score
- Situation described
- Actions taken
- Communication skills
- Impact explained
- Lessons learned
- Collaboration with team
- Resolution achieved
Follow-up questions
- What steps did you take to identify the bug?
- How did you communicate the issue to your team?
Programming Skills and Problem-solving
10 min
What this section is for
Purpose
Assess programming skills and problem-solving abilities.
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Can you write a simple function to reverse a string in your preferred programming language?
What this question is for, and what to listen for
Purpose
Evaluate basic programming skills and syntax knowledge.
Signals to score
- Correct syntax
- Efficient solution
- Clear logic
- Code readability
- Use of language features
- Error handling
- Explanation of code
Follow-up questions
- What language will you use?
- Can you walk me through your code?
•
How do you approach debugging a failing test case?
What this question is for, and what to listen for
Purpose
Assess problem-solving and debugging skills.
Signals to score
- Systematic approach
- Tools used
- Examples of techniques
- Understanding of root cause
- Communication with team
- Documentation of findings
- Resolution achieved
Follow-up questions
- What steps do you take to isolate the issue?
- Can you describe a tool you use for debugging?
Closing
5 min
What this section is for
Purpose
Thanks the candidate for their time, provides next steps, and leaves a positive final impression.
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Do you have any questions for me about the team or the company?
What this question is for, and what to listen for
Purpose
Gauge the candidate’s curiosity and interest in the role.
Signals to score
- Thoughtful questions asked
- Interest in company culture
- Curiosity about growth expressed
- Questions about role raised
- Inquiries about team challenges
- Engagement with responses shown
- Desire to learn next steps
- Focus on company values expressed
Follow-up questions
- What interests you most about this team?
- Are there any areas of the role you’d like to explore further?
Software Engineer in Test (QA) interviews — common questions
- Who is this Software Engineer in Test (QA) interview plan for?
- It is written for the interviewer, not the candidate: the hiring manager, engineer or panel member running the Technical Interview round for a Software Engineer in Test (QA) role. It gives you a 60 min script to follow in the conversation — 9 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 Technical Interview round assess?
- This round is focused on: Testing Concepts, Automation, Test Strategies, Quality Assurance, Programming Skills. It works through Testing Concepts, Automation, Test Strategies and Quality Assurance, Programming Skills and Problem-solving and Closing, scoring against 60 observable signals, with follow-up prompts on all 9 questions for going deeper where an answer is thin.
- How is the 60 min split up?
- Testing Concepts (10 min), Automation (10 min), Test Strategies and Quality Assurance (10 min), Programming Skills and Problem-solving (10 min), Closing (5 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 Software Engineer in Test (QA)?
A single round does not cover a whole role. The other rounds in this library for a Software Engineer in Test (QA):