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In 2PL (two phase locking), what advantage(s) does the rigorous model have over the strict model?

I) There is no advantage over the strict model.

II) In contrast to the strict model, it guarantees that starvation cannot occur.

III) In contrast to the strict model, it guarantees that deadlock cannot occur.

IV) In contrast to the strict model, there is no need to predict data needed in the future.

My TA says all of the above are false and the question is wrong. I am a bit confused. Can someone clarify for me why these are false. the answer sheet say IV is true !!

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