On Friday at 11:30 am you decided to flash back the database because of a user error that occurred at 8:30 am. Which option must you use to check whether a flashback operation can recover the database to the specified time? （）A. Check the alert log fileB.

题目

On Friday at 11:30 am you decided to flash back the database because of a user error that occurred at 8:30 am. Which option must you use to check whether a flashback operation can recover the database to the specified time? （）

A. Check the alert log file

B. Query the V$FLASHBACK_DATABASE_LOG view

C. Query the V$RECOVERY_FILE_DEST_SIZE view

D.Query the V$FLASHBACK_DATABASE_STAT view

E. Check the value assigned for the UNDO_RETENTION parameter

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更多“On Friday at 11:30 am you decided to flash back the database because of a user error that ”相关问题

  • 第1题：

    You are using Recovery Manager (RMAN) for backup and recovery operations with a recovery catalog. You have been taken database backups every evening. On November 15, 2007, at 11:30 AM, you were informed that the USER_DATA tablespace was accidentally dropped.On investigation, you found that the tablespace existed until 11:00 AM, and important transactions were done after that. So you decided to perform incomplete recovery until 11:00 AM. All the archive logs needed to perform recovery are intact. In NOMOUNT state you restored the control file that has information about the USER_DATA tablespace from the latest backup. Then you mounted the database. Identify the next set of commands that are required to accomplish the task? （）

    A. A

    B. B

    C. C

    D. D


    参考答案：A

  • 第2题：

    2．—How _______you?

    —I_______ fine， thanks．

    A．are；is

    B．are； am

    C．are；are

    D．is，am


    正确答案：B
    2．B[解析】人称不同对应be动词的形式不同，第一人称1对应am，第二人称you对应are，故选B。

  • 第3题：

    给客户拨打电话的最佳时间段是（）？

    A．9:00am-11:30am 2:00am-5:00pm

    B．8:00am-11:30am 1:00am-5:00pm

    C．7:30am-11:30am 12:30am-5:00pm

    D．9:00am-10:00am 2:00am-4:00pm


    9:00am-11:30am 2:00am-5:00pm

  • 第4题：

    enodeb可以通过以下哪几种方式执行到 UTRANE的csFa1 lback?()

    A 基于PS切换的CSFa11back

    B 快速( flash)CsFa1back

    C 基于CC/NACC的CsFa11back

    D 基于PS重定向的 CS Fal1back


    参考答案：ABC

  • 第5题：

    5、已知字典 dic={'小欣':90, '小蕊':92, '小微':87}，存放了学生的姓名及成绩。假设变量user存放了某学生的姓名，则以下哪个程序不能够实现功能：在字典中查询该学生信息是否存在，如果存在，输出其成绩，否则输出'该学生不存在！'

    A．if dic.get(user,'error')=='error': print('该学生不存在！') else: print(dic[user])

    B．if user in dic: print(dic[user]) else: print('该学生不存在！')

    C．if user not in dic: print('该学生不存在！') else: print(dic[user])

    D．if dic.count(user)==0: print('该学生不存在！') else: print(dic[user])


    if dic.count(user)==0: print('该学生不存在！') else: print(dic[user])

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