The Basic Assessment's syllabus is very broad. In fact it's massive. It is an introduction to every aspect of beekeeping except microscopy.
The later, much more challenging, modules cover only one knowledge area at a time and in much greater depth. The module exams are written papers, taken under exam conditions.
Assessing a beekeeper's knowledge for the Basic comprises a practical hive inspection followed by oral questions. Both should be completed within an hour - the examiner is expected to cover as much as they can, to make sure there are no serious knowledge gaps. So it's a fairly quick sweep through as much of the syllabus as possible, otherwise the examiner will end up running late which can prove stressful for candidates who are waiting for their assessment.