Let us assume that transaction T1 has arrived before transaction T2. Consider the schedule
S=r1(A); r2(B) ; w2(A); w1(B)
Which of the following is true?
1
Allowed under basic timestamp protocol.
2
Not allowed under basic timestamp protocols because T1 is rolled
3
Not allowed under basic timestamp protocols because T2 is rolled back,
4
None of these
5
Question Not Attempted