Scenario 1 is easy! The answer is given to you since Alexandra is assigned <b>RWCEMFA</b> rights to the folder. At the effrghts.txt file level the answer is also given to you: <b>RWCF</b>. The rights are not cumulative since different rights are granted at the different levels.
Scenario 2 is a little more difficult.
Certification folder – <b>RWCEFA</b>
NW65CNA folder – this becomes cumulative – <b>WCEM + RWCEFA = RWCEMFA</b>
FileSyst folder – full privileges since she has been granted <b>S</b> authority – <b>S</b> always wins!
Good luck in your exams!