Mapping Binary 1:1 Relationships,”A binary 1:1 relationship is mapped much like a binary 1:M relationship, except the placement of the foreign key is somewhat arbitraryEx. (can have null)PROFESSOR(ProfID, Name, Dept, SerialNum)LAPTOP(SerialNum, Model, OS)or (better/ no null)PROFESSOR(ProfID, Name, Dept)LAPTOP(SerialNum, Model, OS

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Mapping Binary 1:1 Relationships,”A binary 1:1 relationship is mapped much like a binary 1:M relationship, except the placement of the foreign key is somewhat arbitraryEx. (can have null)PROFESSOR(ProfID, Name, Dept, SerialNum)LAPTOP(SerialNum, Model, OS)or (better/ no null)PROFESSOR(ProfID, Name, Dept)LAPTOP(SerialNum, Model, OS

ProfID)”