Question: Databases System. The complete book: Exercise 18.3.3 For EACH of the following schedules: a) r1(A); r2 (A); r3 (B); w1>i(A); r2 (C); r2 (B); w2

Databases System. The complete book: Exercise 18.3.3 For EACH of the following schedules:

a) r1(A); r2 (A); r3 (B); w1>i(A); r2 (C); r2 (B); w2 (B); W1(C);

b) r1(A); W1(B); r2(B): w2 (C); r3 (C); w3 (A);

d) r1(A); r2 (A); w1(B); w2 (B); r1 (B ); r2(B); w2 (C); w1(D).

Assume that each transaction takes a lock on each database element immediately before it reads or writes the element, and that each transaction releases its locks immediately after the last time it accesses an element. Question: 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?

PLEASE DO NOT COPY AND PASTE THE PREVIEW ANSWER TO THIS QUESTION FOUND HERE IN CHEGG, BECAUSE IT IS INCORRECT. Note to the Expert: Please follow the specific instructions provided, please do not answer anything if you are not sure of your complete answer. Otherwise, I will fail the class and I cannot afford it again. Please write in understandable English. Thank you so very much.

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