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#1
The most common error was to assume that ownership implies read/write access. While oftentimes you do have the ability to read and write to files you own, this fact cannot be assumed to be true.

To try this, type
chmod u-rw filename
on some file in your cs directory. You will still be the owner, but will not have read/write access. To change back, type
chmod u+rw filename
#3
no notes

#5
no notes

Additional Problem
The most common mistake was to say that the precondition check for inserting S2 fails. It doesn't (see answer key).


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