Intern - Software Engineer (Spring 2027)
Posted Aug 25, 2026 · We last checked this listing on Oct 6, 2026
Likely interview questions for this role
Written from this job description, not a generic list. Each one notes what the interviewer is really checking.
About your past
Tell me about a software project you are proud of. What did you build, and what was hard?
What they are checking: Whether they have built something real and can explain their own technical decisions.
Tell me about a time you received critical feedback on your code. What did you do with it?
What they are checking: Whether they take code review well and learn from it.
What do you want to get out of a fall co-op at Plexus?
What they are checking: Whether they have clear goals and real interest in product development work.
What would you do
Software for a surgical or medical device must be very reliable. How would that change how you write and test code?
What they are checking: Whether they understand that regulated products need careful testing, reviews and documentation.
You are stuck on a bug for a full day. What do you do?
What they are checking: Whether they know when and how to ask for help instead of spinning in silence.
About the work
What languages are you most comfortable in, and have you written code that runs on embedded hardware?
What they are checking: Whether they have exposure to C or embedded work common in product development for medical and industrial devices.
Explain what a microcontroller interrupt is and when you would use one.
What they are checking: Whether they understand basic embedded concepts that come up in firmware work.
How do you debug a program that works on your laptop but fails on the target device?
What they are checking: Whether they can reason about environment differences like timing, memory and hardware.
How do you use Git when working on a team project?
What they are checking: Whether they can work in shared code with branches and reviews without causing problems.
How would you write a test for a function that reads a sensor value and decides whether to raise an alarm?
What they are checking: Whether they think about edge cases and testability, including how to fake hardware inputs.
Practice this interview out loud.
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Practice this out loudThe full job description
As published by Plexus.