> Formulas can sometimes be derived from first principles if necessary.
> (Provided you remember enough background around them.) Unix commands and
> their switches follow no reason or rhyme. Much like the spelling of the
> English language, the only solution is to memorise large chunks of data
> and be able to recall it later. It's not so easy to do that for parts of
> the syllabus that you don't actually need to use regularly...

The exam would be a more realistic and useful test then if it simply 
gave you a real linux prompt and timed how long it took you to get the 
correct answers to do what it wants. The pass rate would then be on how 
long it took you to get all the answers. Knowing where and how to find 
stuff efficiently is far more important than actually knowing it 
(because you could never hope to know even a tiny fraction of all the 
information you have access to). As stated already the stuff you use 
frequently you will remember anyway.

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