Electronics Engineer Interview Questions UK: 8 Real Questions and What Interviewers Want

Before your Electronics Engineer 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 Electronics Engineer interview questions, and what the interviewer is thinking

1. What does a typical day as an electronics engineer involve?

Why they ask: They want to see that you understand the variety of design, bench and cross-team work in the role.

2. Talk me through an electronic product or board you have designed and what you personally contributed.

Why they ask: They want to understand your real hands-on experience and level of responsibility.

3. How would you design an amplifier stage using an op-amp, and what parameters would you check when choosing the part?

Why they ask: Analogue circuit design is a staple of electronics engineering and an op-amp question shows depth.

4. How would you choose and design an ADC signal chain for a sensor measurement?

Why they ask: Most products measure something, and the quality of the measurement depends on the whole chain.

5. How do you choose between a linear regulator and a switching regulator, and what do you watch for when designing a buck converter?

Why they ask: Power supply design is central to many electronics roles and often a source of problems.

6. Compare I2C, SPI, UART and CAN, and explain when you would use each.

Why they ask: Communication buses are everywhere in electronic designs, and this tests practical knowledge.

7. What factors do you consider when selecting a microcontroller for a new product?

Why they ask: Choosing the wrong MCU can derail a project, so they want a structured approach.

8. You power up a new prototype board for the first time and the supply current is far higher than expected, or something starts smelling hot. What do you do?

Why they ask: First bring-up is a daily experience, and they want to see systematic, safe fault-finding.

A sample answer to question 1

What does a typical day as an electronics engineer involve?

It's a mix of desk and bench. Mornings often start at the computer, working on a schematic or board layout in Altium, or simulating a circuit in LTspice before committing to hardware. I'll review design changes and component choices, checking datasheets for things like operating limits and availability. Then I'd spend time at the bench with an oscilloscope, power supply and multimeter, bringing up a new prototype or debugging one that isn't behaving. Throughout the day, I'm talking to colleagues: the firmware engineer about pin assignments and timing, the mechanical engineer about board outline and connectors, and purchasing about lead times and alternatives. I also write test procedures and documentation, and support production when a unit fails test. What I enjoy is that you can see a design go from an idea to something that works, but it needs patience, because things rarely work the first time.

Common mistake to avoid: Describing only theory or only bench work; ignoring cross-team communication

Want the rest?

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