Application Developer Co-op
Posted Sep 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 project where you wrote code in C# or a similar language. What did it do and what was the hardest part?
What they are checking: Whether they have built something real and can explain their own decisions clearly.
Tell me about a time you were stuck on a problem. How long did you try before asking for help?
What they are checking: Whether they balance independence with knowing when to ask, which keeps a co-op productive.
Describe a time you noticed a manual process that could be automated. What did you do about it?
What they are checking: Whether they look for improvement opportunities on their own, which the posting calls out directly.
This co-op runs January through August. What do you hope to be able to do by the end of it that you can't do now?
What they are checking: Whether they have specific growth goals and will take ownership of their own learning.
What would you do
You fix a bug and your change breaks something else that seemed unrelated. What do you do?
What they are checking: Whether they test carefully, speak up quickly and learn to check side effects before shipping.
A business partner asks for a dashboard but can't tell you what decisions it should support. How do you proceed?
What they are checking: Whether they ask good questions to find the real need before building the wrong report.
About the work
How would you write a SQL query that totals orders by customer for the last 30 days?
What they are checking: Whether they have working SQL basics with grouping, filtering and dates that business reporting needs.
What is XML used for, and when might you run into it in a business application?
What they are checking: Whether they understand structured data formats commonly used to move information between systems.
How have you used Git on a team project? Tell me about a time a merge went wrong.
What they are checking: Whether they can work in a shared codebase without losing or overwriting other people's work.
How do you use AI tools when you code, and how do you check what they give you?
What they are checking: Whether they treat AI output as a draft to verify rather than trusting it blindly.
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Practice this out loudThe full job description
As published by Greenheck.