系统中有R类资源m个，现有n个进程互斥使用。若每个进程对R资源的最大需求为w，那么当m、n、w取如表1-5所示的值时，对于表1-5中的a~e这5种情况，（）可能会发生死锁。

A、a和b

B、b和c

C、c和d

D、c和e

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• Mary has a view called EMP_DEPT_LOC_VU that was created based on the EMPLOYEES, DEPARTMENTS, and LOCATIONS tables. She granted SELECT privilege to Scott on this view. Which option enables Scott to eliminate the need to qualify the view with the name MARY .EMP_DEP_LOC_VU each time the view is referenced?（）

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  E、Scott cannot create a synonym because synonyms can be created only for tables.

  F、Scott cannot create any synonym for Mary's view. Mary should create a private synonym for the view and grant SELECT privilege on that synonym to Scott.

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