UGC NET CS 2017 Jan- paper-3

Question 7

Consider following schedules involving two transactions:

S1 : r1(X); r1(Y); r2(X); r2(Y); w2(Y); w1(X)

S2 : r1(X); r2(X); r2(Y); w2(Y); r1(Y); w1(X)

Which of the following statement is true?

A	Both S1 and S2 are conflict serializable.
B	S1 is conflict serializable and S2 is not conflict serializable.
C	S1 is not conflict serializable and S2 is conflict serializable.
D	Both S1 and S2 are not conflict serializable.

Question 7 Explanation:

Correct Answer: C

Question 7 Explanation: