Discussion Forum
Que. | Consider the following database schedule with two transactions, T1 and T2. S = r2(X); r1(X); r2(Y); w1(X); r1(Y); w2(X); a1; a2; where ri(Z) denotes a read operation by transaction Ti on a variable Z, wi(Z) denotes a write operation by Ti on a variable Z and ai denotes an abort by transaction Ti . Which one of the following statements about the above schedule is TRUE? |
a. | S is non-recoverable |
b. | S is recoverable, but has a cascading abort |
c. | S does not have a cascading abort |
d. | S is strict |
Answer:S does not have a cascading abort |