Software Tester Interview Questions UK: 8 Real Questions and What Interviewers Want

Before your Software Tester interview, it helps to see the questions from the interviewer's side. We have picked eight from our set of 25 and added the reason each one gets asked.

Eight Software Tester interview questions, and what the interviewer is thinking

1. What is the difference between verification and validation, and between functional and non-functional testing?

Why they ask: A foundational question to check you understand core testing concepts.

2. How do you write a good bug report?

Why they ask: Bug reports are the tester's main product, and poor ones waste developer time.

3. Explain the testing pyramid and how you decide what to automate.

Why they ask: They want to see strategic thinking about automation rather than automating everything.

4. Which test automation tools and frameworks have you used, and how do you keep automated tests reliable?

Why they ask: Tool familiarity matters in UK tester roles, along with a mindset for maintainable automation.

5. The release is due tomorrow and you have found a serious bug. The product owner wants to release anyway. What do you do?

Why they ask: A very common scenario testing integrity and communication under pressure.

6. Can you explain some test design techniques, such as boundary value analysis and equivalence partitioning?

Why they ask: They want to see you can design efficient tests rather than test at random.

7. Tell me about a significant bug you found that others had missed. How did you find it?

Why they ask: They want to see curiosity, thoroughness and the value you add as a tester.

8. What does a typical day as a software tester involve?

Why they ask: They want to confirm you understand the reality of the role.

A sample answer to question 1

What is the difference between verification and validation, and between functional and non-functional testing?

Verification asks whether we are building the product right, so it checks that the software conforms to the specification through reviews, walkthroughs and static analysis. Validation asks whether we are building the right product, meaning it meets the user's real needs, and that's usually done through dynamic testing and user acceptance. Functional testing checks what the system does, for example that a customer can add an item to a basket, apply a discount code and complete payment. Non-functional testing checks how well it does it, covering performance, security, usability, accessibility, compatibility and reliability. A page might work perfectly but take twelve seconds to load under a normal load, which would pass the functional test and fail the non-functional one. Good testers cover both, because users judge a product on the whole experience, not only on whether features technically exist.

Common mistake to avoid: Treating them as the same thing; Forgetting non-functional testing

Want the rest?

Full model answers, key points and common mistakes for all 25 questions are on the Software Tester interview questions page. The first five are free, no sign-up needed.