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You work as a database administrator for Certkiller .com. One of the user sessions was terminated abnormally in the middle of a transaction. What does Oracle database do to recover it?()

  • A、Uses undo data for roll forward
  • B、Uses Flashback Log for recovery
  • C、Uses online redo logs to roll back
  • D、Uses undo data to roll back the transaction
  • E、Uses Recovery Manager (RMAN) to roll back
  • F、Uses the System Monitor (SMON) background process to perform instance recovery

参考答案

更多 “You work as a database administrator for Certkiller .com. One of the user sessions was terminated abnormally in the middle of a transaction. What does Oracle database do to recover it?()A、Uses undo data for roll forwardB、Uses Flashback Log for recoveryC、Uses online redo logs to roll backD、Uses undo data to roll back the transactionE、Uses Recovery Manager (RMAN) to roll backF、Uses the System Monitor (SMON) background process to perform instance recovery” 相关考题
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考题 多选题Which three statements are true about Flashback Database?()AFlashback logs are written sequentially, and are archived.BFlashback Database uses a restored control file to recover a database.CThe Oracle database automatically creates, deletes, and resides flashback logs in the Fast RecoveryArea.DFlashback Database can recover a database to the state that it was in before a reset logs operation.EFlashback Database can recover a data file that was dropped during the span of time of the flashback.FFlashback logs are used to restore to the blocks' before images, and then the redo data may be used to roll forward to the desired flashback time.

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考题 单选题You work as a database administrator for Supportcenter.cn. One of the user sessions was terminated abnormally in the middle of a transaction. What does Oracle database do to recover it?()A Uses undo data for roll forwardB Uses Flashback Log for recoveryC Uses online redo logs to roll backD Uses undo data to roll back the transactionE Uses Recovery Manager (RMAN) to roll backF Uses the System Monitor (SMON) background process to perform instance recovery

考题 多选题You work as a database administrator for Certkiller .com. In the middle of a transaction, a user session was abnormally terminated but the instance is still up and the database is open. Which two statements are true in this scenario?()AEvent Viewer gives more details on the failure.BThe alert log file gives detailed information about the failure.CPMON rolls back the transaction and releases the locks.DSMON rolls back the transaction and releases the locks.EThe transaction is rolled back by the next session that refers to any of the blocks updates by the failed transaction.FData modified by the transaction up to the last commit before the abnormal termination is retained in the database.

考题 多选题You can use Oracle Flashback to look at past activity in your database. What are two other characteristics of Oracle Flashback?()AOracle Flashback uses undo information to construct consistent data.BYou can use a cursor opened while using an Oracle Flashback image to perform DML once you deactivate Oracle Flashback in your session.CYou can only use Oracle Flashback view of the data if the required records are still in the online redo log files.DOracle Flashback lists the DML that was executed during the period you identify when initiating your session.

考题 单选题You work as a database administrator for Certkiller .com. One of the user sessions was terminated abnormally in the middle of a transaction. What does Oracle database do to recover it?()A Uses undo data for roll forwardB Uses Flashback Log for recoveryC Uses online redo logs to roll backD Uses undo data to roll back the transactionE Uses Recovery Manager (RMAN) to roll backF Uses the System Monitor (SMON) background process to perform instance recovery