consider the schedule S given below.S: R1 (X), W2 (X), W1 (X),Which of the following statement is correct?S is neither view nor conflict serializable.S is view-serializable but not conflict-serializable.S is conflict serializable but not view serializable.S is both view and conflict serializable.

The schedule S: R1 (X), W2 (X), W1 (X) is neither view nor conflict serializable.

Here's why:

1. Conflict Serializable: A schedule is conflict serializable if it can be transformed into a serial schedule by swapping non-conflicting operations. In this case, we cannot swap W2(X) and W1(X) because they are conflicting operations (both are write operations on the same data item X). Therefore, the schedule is not conflict serializable.

2. View Serializable: A schedule is view serializable if it is view equivalent to a serial schedule. In this case, the initial read on X is done by T1 in both the given schedule and any serial schedule. However, the final write on X in the given schedule is done by T1, but in any serial schedule (T1-T2 or T2-T1), the final write on X would be done by T2. Therefore, the given schedule is not view equivalent to any serial schedule, and hence it is not view serializable.

So, the correct statement is "S is neither view nor conflict serializable."

The schedule S: R1 (X), W2 (X), W1 (X) is neither view nor conflict serializable.

Here's why:

1. Conflict Serializable: A schedule is conflict serializable if it can be transformed into a serial schedule by swapping non-conflicting operations. In this case, we cannot swap W2(X) and W1(X) because they are conflicting operations (both are write operations on the same data item X). Therefore, the schedule is not conflict serializable.

2. View Serializable: A schedule is view serializable if it is view equivalent to a serial schedule. In this case, the initial read on X is done by T1 in both the given schedule and any serial schedule. However, the final write on X in the given schedule is done by T1, but in any serial schedule (T1, T2 or T2, T1), the final write on X would be done by T2. Therefore, the given schedule is not view equivalent to any serial schedule, and hence it is not view serializable.

So, the correct statement is "S is neither view nor conflict serializable."