I have just taken certification for Foundational C# with Microsoft Certification.
I tech C# at high level, so I spotted some problems, the worst being:
Question about “how to catch multiple exceptions, using one catch” You can’t, which wasn’t a possible answer.
There were other problems, notably a couple of questions with multiple correct answers. This might be by design, but is quite confusing, since multiple choice indicates that only one is possible.
The course was created, and is maintained, by Microsoft. FreeCodeCamp links to the course and keeps your progress, so that you have a hub of various learning modules.
Maybe the phrasing is up for interpretation, but you can catch multiple types of exceptions using one catch. If you have an overarching try/catch where the catch is of type Exception, it will catch any exception that goes through it. That is the way I interpreted that question.