Question: PLEASE READ THE QUESTION CLEARLY AND THEN ANSWER. only a few possible values, (such as a M / F gender column or a State column)

PLEASE READ THE QUESTION CLEARLY AND THEN ANSWER.

only a "few" possible values, (such as a "M / F" gender column or a "State" column) (a) Are these columns usually good candidates for indexes? Why or why not? (b) What if the tuples in these tables could be stored on disk in order (lexically, numerically, whatever is appropriate) would queries benefit from this? Why or why not

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