Managing Undo Data

Maintaining read-consistent queries

Performing flashback queries

Recovering uncommitted changes during instance recovery (correct)

Rolling back transactions before commit

Undo data is managed by the user

Undo data is managed manually by the database administrator

Undo data is not managed automatically

Undo data is managed automatically by the database (correct)

Until the database is shut down

Until the session is closed

Until the transaction is committed (correct)

Until the transaction is rolled back

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