From last years resit:
``Briefly describe the basic architecture of a typical expert
system, mentioning the purpose of each of the main components.''
One I've just made up:
``A travel agent asks you to design an expert system to help
people choose where to go on holiday. Discuss whether this
might be a suitable problem for an expert system, and
say how you might start aquiring the necessary expert knowledge.''
(If you feel ambitious - try designing an expert system
for this task, based on forward or backward chaining - you
may want to read the next section first).