The system shall write on white paper with the specified level of darkness. The interviewer wants to test the basic testing skills, knowledge and intuitiveness of your testing capabilities. If you are an experienced candidate, the interviewer wants to check on how you test something new that’s not related to the domain. If you do use this example then you may want to consider a positive and negative test scenario where the eraser works and doesn’t work. Gather functional requirements and functional specifications of the system. The basic test case provided in the article might have given the right idea on [...]