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You work as a database administrator for Supportcenter.cn. You received the following error while working on your database: ORA-01555: snapshot too old ,In which situation would you receive such an error?()

  • A、You performed rollback after commit.
  • B、If a log switch occurs in your database.
  • C、Thearchiverfails to generate an archived log file.
  • D、Instance recovery fails to find one of the redo log files.
  • E、A long-running query is unable to get read-consistent image.
  • F、If you perform manual undo management operations in auto mode.

参考答案

更多 “You work as a database administrator for Supportcenter.cn. You received the following error while working on your database: ORA-01555: snapshot too old ,In which situation would you receive such an error?()A、You performed rollback after commit.B、If a log switch occurs in your database.C、Thearchiverfails to generate an archived log file.D、Instance recovery fails to find one of the redo log files.E、A long-running query is unable to get read-consistent image.F、If you perform manual undo management operations in auto mode.” 相关考题
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考题 单选题You work as a database administrator for Supportcenter.cn. Your database is in NOARCHIVELOG mode and you want to perform a backup. Which type of backup would be appropriate in this case?()A Hot backupB Online backupC consistent backupD incremental backupE inconsistent backup

考题 多选题You started a long transaction. Before committing, you executed a query on one of the tables currently being modified. You received the following error: ORA-01555: snapshot too old How would you prevent such an error in the future?()Aguarantee undo retentionBadd one more redo log groupCsize the redo log files appropriatelyDsize the UNDO tablespace appropriatelyEsize the SYSTEM tablespace appropriatelyFconfigure an appropriate undo retention intervalGchange automatic undo management to manual

考题 单选题You are working on a database, where you have three redo log groups. When the database is down for a backup, an operating system (OS) user deletes all the redo log files in a group. What will happen when you open your database?()A  The instance starts, the database is mounted, but efforts to open the database fail, and an error about the missing redo log group is displayed.B  Before the instance starts, you receive an error about the missing redo log files of a group.C  The instance starts and the database opens with an error message written to the alert log file.D  The instance starts and the database opens because two redo log groups still exist.E  The instance starts and the database opens, but every attempt to write to redo log files fails with an error.

考题 单选题You work as a database administrator for Supportcenter.cn. You received the following error while working on your database: ORA-01555: snapshot too old ,In which situation would you receive such an error?()A You performed rollback after commit.B If a log switch occurs in your database.C Thearchiverfails to generate an archived log file.D Instance recovery fails to find one of the redo log files.E A long-running query is unable to get read-consistent image.F If you perform manual undo management operations in auto mode.

考题 单选题You work as a database administrator for Certkiller .com. When you tried to connect to the database, you received the following error: ERROR:  ORA-12541:TNS:no_listener  You found that the listener is not running on the server, so you issued the following command in the Listener Control utility to start the listener.  lsnrctlSTART  What statement is true?()A It would attempt to start the default listenerB It would start the most recently created listener.C It would display an error with a message asking for the listener name to be specified.D It would show you a list of listeners and prompts for the listener name that you want to start.