The majority of examinations are sat face-to-face. Check your google calendar when the timetable is released for the details of exam locations.
Some exams are online and details of these will be provided to you in due course. Where an exam is online, it will run to the same, or a similar schedule as to the standard exam timetable. Students' Google calendars will include details of how to access the exam. Online exams will be time-constrained, with a time window for completion which allows for any international time differences, rest breaks, additional writing time or technical problems. You should aim to complete the tasks in the time allowed, on your own.