Which statement accurately describes isolation in the context of database transactions?
1
Isolated transactions are always serialized, occurring in a distinct order without any parallel transactions
2
Reads and writes in isolated transactions can impact other transactions occurring simultaneously in the same database.
3
Isolation ensures that transactions can freely read and write to the same place without any impact.
4
The optimistic transaction schema guarantees that transactions hitting the same place twice will not be aborted or retried.