Consider the following schedules:
S1:
| T1 | T2 |
| R(x) | |
| W(x) | |
| R(x) | |
| R(y) | |
| W(x) | |
| Commit | |
| Abort |
S2:
| T1 | T2 |
| R(x) | |
| W(x) | |
| R(x) | |
| R(y) | |
| W(x) | |
| W(y) | |
| Commit | |
| Commit |
Which of the following options is true?
1
Both S1 and S2 are recoverable
2
Neither S1 nor S2 is recoverable
3
S1 is recoverable and S2 is not recoverable
4
S1 is not recoverable and S2 is recoverable
5
Question Not Attempted