Database System:

Exercise 18.2.4: For each of the following schedules: a) ri(A); r2(A); ra(B); w(A); r2(C); r2(B); w2(B); w(C); b) r1(A); wi (B): r2(B): w2(C); rs(C); us(A); d) (A); ra(A); wi(B); (B);(B); r(B); w2(C); w(D) Exercise 18.3.3: For each of the schedules of Exercise 18.2.4, assume that each transaction takes a lock on each database elemenediately before it reads or writes the element, and that each transaction releases its locks immedi ately after the last time it accesses an element. Tell what the locking scheduler would do with each of these schedules; i.e., what requests would get delayed, and when would they be allowed to resume