stephen.long 56048 (5/5/2014)

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The list shown here includes bit in the list of "exact numeric types".

http://msdn.microsoft.com/en-us/library/ms187752.aspx (Data Types (Transact-SQL))

The definition of bit, shown here, calls it "An integer data type that can take a value of 1, 0, or NULL."

http://msdn.microsoft.com/en-us/library/ms177603.aspx (bit (Transact-SQL))

Since:

- a bit can only store 0 and 1, so it is an "exact number integer data type", as specified in the question

- bit doesn't support negative numbers

- 0-1 is a smaller range than 0-255

The correct answer should be bit.