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Questions and Answers
Which of the following is NOT a use of Undo Data in database administration?
Which of the following is NOT a use of Undo Data in database administration?
- Maintaining read-consistent queries
- Performing flashback queries
- Recovering uncommitted changes during instance recovery (correct)
- Rolling back transactions before commit
What is the default behavior of Oracle database regarding the management of undo data?
What is the default behavior of Oracle database regarding the management of undo data?
- 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)
How long does Oracle database retain undo data?
How long does Oracle database retain undo data?
- Until the database is shut down
- Until the session is closed
- Until the transaction is committed (correct)
- Until the transaction is rolled back
What is the purpose of rollback transactions using undo data?
What is the purpose of rollback transactions using undo data?
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When can a user perform a flashback query?
When can a user perform a flashback query?
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