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Suppose that transactions T1 and T2 can be decomposed into the subtransactions T1 : T1,1, T1,2 and T2 : T2,1, T2,2 such that each subtransaction individually maintains the consistency constraints of the database. Instead of guaranteeing that all schedules involving T1 and T2 are serializable, suppose that a concurrency control guarantees that all subtransactions are always executed serializably.
a. Will T1 always be serializable with T2? Explain. b. Will integrity constraints be maintained by all possible schedules? c. What possible problems might arise if the concurrency control schedules transactions in this way?
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Answer the following statement true (T) or false (F)
Make an audio collage. Make it at least five seconds long, and include at least two different sounds (e.g., come from di®erent ¯les). Make a copy of one of those di®erent sounds and modify it using any of the techniques described in this chapter (e.g., mirroring, splicing, and volume manipulations). Splice together the original two sounds and the modified sound to make the complete collage.
What will be an ideal response?
When you assign a color to a mesh point, the color gradates ____________________ from the point.
Fill in the blank(s) with the appropriate word(s).