Complete the code to identify the type of schedule that preserves consistency in transactions.
A schedule is considered [1] if it results in the same state as some serial execution of transactions.
A serializable schedule ensures that the outcome is equivalent to some serial order of transactions, preserving consistency.
Complete the sentence to describe conflict serializability.
A schedule is conflict serializable if it can be transformed into a serial schedule by swapping [1] operations.
Conflict serializability allows swapping only non-conflicting operations to achieve a serial schedule.
Fix the error in the statement about view serializability.
View serializability considers schedules equivalent if they have the same [1] and final writes.
View serializability depends on preserving view equivalence, which involves the same reads-from relations and final writes, not just conflict order.
Fill both blanks to complete the definition of recoverable schedules.
A schedule is recoverable if a transaction commits only after all transactions whose changes it [1] have [2].
Recoverable schedules ensure that a transaction commits only after the transactions it reads from have committed, preventing cascading aborts.
Fill all three blanks to complete the explanation of strict schedules.
In a strict schedule, a transaction cannot [1] or [2] a data item until the transaction that last [3] it has committed or aborted.
Strict schedules prevent transactions from reading or writing data items until the transaction that last wrote them has finished, ensuring recoverability and avoiding cascading aborts.