A short while ago I applied for a QA internship. The first round of interviews involved a video conference call with some of the Software Testers from the company. At some point during the interview they asked me to demonstrate how I would test the Calculator application installed on Windows 7 machines.

I admit I was a bit lost for what to do. To my best ability, I tested out simple arithmetic equations, unit conversion, and keyboard vs mouse input. I did not get the job.

This led me to ask, as a Software Tester, what sort of things would you look for in a candidate if you gave them this kind of test?

  • 1
    I found a lot of answers by Googling "how to test a calculator".
    – user246
    Nov 7, 2016 at 23:18

2 Answers 2


I think most of us would be looking for various buzz words. Test plan, edge cases, partitioning, black box, requirements, specification. The candidate who looks like they know how to structure a test plan and actually knows something about software testing theory would score points.


1).test the display. 2).0-9 keys 3).-+*/ 4).= 5).Clear button Those are high priority

Then low priority all the other keys.

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