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Suppose we execute as a transaction T one of the four programs of Exercise 6.6.1, while other transactions that are executions of the same or
Suppose we execute as a transaction T one of the four programs of Exercise 6.6.1, while other transactions that are executions of the same or a different one of the four programs may also be executing at about the same time. What behaviors of transaction T may be observed if all the transactions run with isolation level READ UNCOMMITTED that would not be possible if they all ran with isolation level SERIALIZABLE? Consider separately the case that T is any of the programs (a) through (d) of Exercise 6.6.1.
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