To view the guide on defining questions for answering in Excel in the exam editor, click here

To view the guide on how to check an Excel question in TomaGrade click here

In the monitor, in the 'Exam Preview' tab, for questions to which an Excel file has been added, an “Attached filesbutton will appear. 

Pressing the button shows the attached files and allows them to be opened. 

The file cannot be changed!
Any change will be saved only on the local computer and will not be part of the exam