The _____ Guarantees That If a Portion of a Transaction

question 3

Multiple Choice

The _____ guarantees that if a portion of a transaction operation cannot be committed, all changes made at the other sites participating in the transaction will be undone to maintain a consistent database state.

• A) DO-UNDO-REDO protocol
• B) two-phase commit protocol (2PC)
• C) coordinator protocol
• D) write-ahead protocol