A bank needs to ensure that after an account transfer transaction completes, the revised account balances persists even if the database system hosting the transaction becomes temporarily unavailable.
Correct: when a transaction has been committed, it will remain committed. After the account transfer transaction has completed, the revised account balances are persisted so that even if the database system were to be switched off, the committed transaction would be reflected when it is switched on again. --> https://learn.microsoft.com/en-us/training/modules/explore-core-data-concepts/5-transactional-data-processing
Durability ensures that once a transaction is committed, its effects persist even in the face of system failures. The changes made by a committed transaction should be permanent.
Example:
After Alice's transfer to Bob is successful and the system acknowledges the completion, even if there's a power outage or system crash, the $100 transfer should still be reflected in the database once the system is restored.
Transaction Durability: Simple English.
**The previously completed (committed) transaction must PERSIST even if there is a system crash/outage thereafter.
Answer is correct. Isolation talks about two concurrent transactions are isolated such way one transaction does not affect other other transaction
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