Thanks a lot for sharing your story ! It helps me lot!
Espoir Murhabazi

Your English is bad, please you need to work on it or was it typing issue? If I understood your question, sometimes what they consider is the type of the passed argument, a function returning a certain value when a result or parameter is null, undefined, it could be any sort of test, just study the test first and understand it before writing your codes to satisfy those test cases. All the best… Meanwhile I am no longer with them any more, so consult others…

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