On Tuesday， a junior DBA dropped an important application user account， whose schema has important tables. You are asked to recover all the objects in the schema. On investigation， you find that the user account was dropped at 11：00 a.m. and Sunday’s backup is the most recent backup. Which flashback feature would you use？（）A、Flashback DropB、Flashback TableC、Flashback DatabaseD、Flashback Version QueryE、Flashback Transaction Query
On Tuesday， a junior DBA dropped an important application user account， whose schema has important tables. You are asked to recover all the objects in the schema. On investigation， you find that the user account was dropped at 11：00 a.m. and Sunday’s backup is the most recent backup. Which flashback feature would you use？（）
- A、Flashback Drop
- B、Flashback Table
- C、Flashback Database
- D、Flashback Version Query
- E、Flashback Transaction Query
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定义如下枚举类型：enum{Monday,Tuesday,Wednesday,Thursday,Friday=2};表达式 Wednesday= =Friday的值是( )。A．falseB．trueC．2D．异常
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定义如下枚举类型enum{Monday，Tuesday，Wednesday，Thrusday，Friday=2}；则下列选项正确的是（ ）。A.表达式Wednesday==Friday的值是trueB.Dayday；day=3；C.Dayday；day=Monday＋3；D.Daydayday=Tuesday＋10；
定义如下枚举类型；enum{ Monday, Tuesday, Wednesday, Thrusday, Friday=2)；，则下列语句正确的是( )。A．表达式Wednesday==Friday 的值是trueB．Day day；day=3C．Day day；day=Monday+3D．Day day；day=Tuesday+10
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单选题You have a file server named Server1 that runs Windows Server 2003 Service Pack 2 (SP2). You need to implement a backup schedule on Server1 to meet the following requirements: ·Everyday, back up all files and folders to disk. ·Every Friday, back up all files and folders to tape. ·Every Sunday, Tuesday, and Thursday, back up only the files and folders that have changed since the previous Friday’s backup to tape. Which backup jobs should you create? （）A·a normal backup to disk everyday ·a normal backup to tape on Friday ·a differential backup to tape on Sunday, Tuesday, and ThursdayB·a normal backup to disk everyday ·a normal backup to tape on Friday ·an incremental backup to tape on Sunday, Tuesday, and ThursdayC·a copy backup to disk everyday ·a normal backup to tape on Friday ·a differential backup to tape on Sunday, Tuesday and, ThursdayD·a copy backup to disk everyday ·a normal backup to tape on Friday ·an incremental backup to tape on Sunday, Tuesday and, Thursday
单选题Your database has a backup that was taken yesterday （Tuesday） between 13：00 and 15：00 hours. This is the only backup you have. You have lost all the archived redo logs generatedsince the previous Monday， but you have archived redo logs available from the previous Sunday and earlier. You now need to restore your backup due to database loss. To which point can you restore your database？（）A 13：00 on Tuesday.B 15：00 on Tuesday.C Up until the last available archived redo log on Sunday.D To any point； all the redo should still be available in the online redo logs.E The database is not recoverable.
单选题You take backups of your hard drives every night. On Thursday morning you see that the hard disk has crashed. The backup log shows: * Friday normal backup completed * Saturday incremental backup completed * Sunday incremental backup completed * Monday incremental backup completed * Tuesday incremental backup incomplete * Wednesday incremental backup completed. What should you do to restore your data to the update state?（ ）ARestore using the tapes from Friday， Saturday， Sunday， Monday and Wednesday.BRestores using only Fridays tapeCRestore using the tapes from Thursday， Friday， Saturday， Sunday and Tuesday.DRestore using the tapes from Friday and Tuesday.ERestore using the tapes from Tuesday and Thursday.
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问答题Practice 6 Movie-goers(电影院常客) across China will now only pay half price for tickets Tuesday, which will start in July. Any movie shown on Tuesday will be half price, even for new movies. The purpose is to bring people back to the cinema on Tuesday, when numbers of audiences are the lowest of the week. Some cinemas in Beijing and Shenzhen that began offering such discounts in advance have seen an increase in audiences Tuesday evenings.