1) You cannot use a sheet of paper for braindumps during the online proctored exam, instead, you will be given an app (similar to MS paint) for note-taking purposes.
2) The break is mandatory, however, I heard that you can end the break early if you want.
Training for Project Management Professional (PMP)®, PMI Agile Certified Practitioner (PMI-ACP)®, and Certified Associate in Project Management (CAPM)®