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After performing a clean shut down of the database instance for maintenance， you mount thedatabase and then execute a command to open the database： SQL> ALTER DATABASE OPEN；  Which two statements are true（）A、The online redo log files and online data file

题目

After performing a clean shut down of the database instance for maintenance， you mount thedatabase and then execute a command to open the database： SQL> ALTER DATABASE OPEN；  Which two statements are true（）

  • A、The online redo log files and online data files are opened.
  • B、All the online data file headers are checked for consistency.
  • C、Instance recovery is performed before opening the database.
  • D、The path and existence of all the log file members are checked
相似考题

1.You are working on the PROD database， which is in NOARCHIVELOG mode. You lost the active online redo log group due to a media failure. How should you recover your database？（）A、 Restore the database from a whole consistent backup and start the database in MOUNT mode. Then， open the database with the RESETLOGS option after performing a cancel-based recovery.B、 Restore the database from a whole consistent backup and start the database in MOUNT mode. Then， drop the lost redo log group and open the database with the RESETLOGS option after performing a cancel-based recovery.C、 Restore the database from a whole consistent backup and start the database in MOUNT mode. Then， clear the lost redo log group and open the database with the RESETLOGS option after performing a cancel-based recovery.D、 Do nothing. You do not need to recover the database in this case； an instance recovery will be performed by the SMON process on startup.

2. You are working on an Oracle Database 10g database. Because of data loss， you decided to perform a Flashback Database operation using the following command：  SQL> FLASHBACK DATABASE TO TIMESTAMP（SYSDATE 5/24）;  Which two statements are true？ （）A、SYSDATE should not be used with TIMESTAMP.B、The database must have multiplexed redo log files.C、The database must be in the MOUNT state to execute the command.D、The database must be opened with the RESETLOGS option after the flashback operation.E、The entire database needs to be restored from the most recent backup before the flashback operation.

3.Which two statements are true regarding the database in ARCHIVELOG mode？（）A、You have to shut down the database to perform the backups.B、Archiving information is written to the data files and redo log files.C、You can perform complete database backups without closing the database.D、Online redo log files have to be multiplexed before putting the database in ARCHIVELOG mode.E、All the previous database backups become invalid after you configure the database to ARCHIVELOG mode.

4.If a log file becomes corrupted， it may cause the database to stall. How would you correct such a situation？（）  A、 Recover the online redo log from backup.B、 Delete and re-create the log file.C、 Use the alter database clear logfile command to clear the log file.D、 Shut down the database and restart it.E、 Shut down the database and then mount it. Clear the log file with the alter database clear logfile command and then restart the database with alter database open resetlogs.

参考答案和解析
正确答案:A,B
更多“After performing a clean shut down of the database instance for maintenance， you mount thedatabase and then execute a command to open the database： SQL ALTER DATABASE OPEN；  Which two statements are true（）A、The online redo log files and online data files ”相关问题

  • 第1题：

    You have to shut down the database instance with the ABORT option because of a hardware failure. Which statement is true about the subsequent opening of the database？（）

    • A、The database would open normally.
    • B、The database would not open， and it would stop at mount stage.
    • C、The database would open after automatically performing instance recovery.
    • D、The database would not open， and you have to perform database recovery to open it.

    正确答案:C

  • 第2题：

    You work as a database administrator for Certkiller .com. Your database is in the MOUNT state and you execute the following command to open it ALTER DATABASE OPEN； What two actions are performed as a result of this command？（）

    • A、All control files are opened
    • B、All redo files are opened
    • C、The password file is opened
    • D、The parameter file is opened
    • E、All online data files are opened

    正确答案:B,E

  • 第3题：

    Which are the correct steps， in order， to deal with the loss of an online redo log if the database has not yet crashed？（）   a. Issue a checkpoint.  b. Shut down the database.  c. Issue an alter database open command to open the database.  d. Startup mount the database.  e. Issue an alter database clear logfile command.  f. Recover all database datafiles.

    • A、a， b， c， d
    • B、b， d， e， c
    • C、a， b， d， e， c
    • D、b， f， d， f， c
    • E、b， d， a， c

    正确答案:C

  • 第4题：

    Which three statements are true about the stages of database startup？（）

    • A、Data files and redo log files can be renamed at the MOUNT stage.
    • B、Control files are read at the OPEN stage for the location of data files.
    • C、Control files are required to bring the database to the NOMOUNT stage.
    • D、Data files and redo log files are made available to users at the OPEN stage.
    • E、Data files and online redo log files are checked for consistency while opening the database

    正确答案:A,D,E

  • 第5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.

    正确答案:A

  • 第6题：

    Your database is set in NOARCHIVELOG mode and is backed up every night. There are 10 redo log groups on the database， each with three members， making a total of 30 redo log files. At lunchtime the server unexpectedly gets shut down. Upon restarting you notice that the data file belonging to the SYSTEM tablespace has become corrupted. You also notice that there have been 15 log switches during the day. Which solution should you use to recover as much committed data as possible？（）

    • A、Restore the data file for the SYSTEM tablespace then open the database. 
    • B、Restore all redo logs form last night's backup, then restart the database. 
    • C、Perform a complete restore of all files from last night's backup. Data entered into the database today must be reentered. 
    • D、Mount the instance, take the SYSTEM tablespace offline, open the database, and then restore the data file, recover it, and bring the tablespace online. 

    正确答案:C

  • 第7题：

    单选题
    Two data files have been deleted at the operating system level by accident. Your database is running in ARCHIVELOG mode and online backups are taken nightly. One of the data files that has been deleted belongs to the USERS tablespace on the other belongs to the SYSTEM tablespace. How can you recover from this situation？（）
    A

    Shut down the database, restore the two data files and then start up the database. 

    B

    Take the system and users tablespace offline, restore the two data files, recover the two datafiles, and then bring the SYSTEM and USERS tablespaces online. 

    C

    Shut down the database, restore the two data files, start up the database in MOUNT mode, recover the two data files, and then alter the database open. 

    D

    Take the SYSTEM and USERS tablespaces offline, recover the two datafiles and then bring the SYSTEM and USERS tablespaces online.


    正确答案： B
    解析： 暂无解析

  • 第8题：

    单选题
    You work as a database administrator for Supportcenter.cn. You started the instance using theinit.orafile. You have two control files and three redo log groups in your database. You decided to protect the database against failures by adding one more control file. Which file is the appropriate way to perform this task？（）
    A

    Shut down the instance， copy the control file to the third location and open the database.

    B

    Abort the instance， copy the control file to the third location， modify the CONTROL_FILES parameter in theinit.orafile and open the database.

    C

    Copy the control file to the third location， modify the CONTROL_FILES parameter in theinit.orafile， restart the instance and open the database.

    D

    Shut down the instance， copy the control file to the third location， modify the CONTROL_FILES parameter in theinit.orafile and open the database.

    E

    Shut down the instance， startup in the mount state， copy the control file to the third location， modify the CONTROL_FILES parameter ininit.oraand open the database.


    正确答案： D
    解析： 暂无解析

  • 第9题：

    多选题
    Which three statements are true about the stages of database startup？（）
    A

    Data files and redo log files can be renamed at the MOUNT stage.

    B

    Control files are read at the OPEN stage for the location of data files.

    C

    Control files are required to bring the database to the NOMOUNT stage.

    D

    Data files and redo log files are made available to users at the OPEN stage.

    E

    Data files and online redo log files are checked for consistency while opening the database


    正确答案： A,C
    解析： 暂无解析

  • 第10题：

    单选题
    If a log file becomes corrupted， it may cause the database to stall. How would you correct such a situation？（）
    A

     Recover the online redo log from backup.

    B

     Delete and re-create the log file.

    C

     Use the alter database clear logfile command to clear the log file.

    D

     Shut down the database and restart it.

    E

     Shut down the database and then mount it. Clear the log file with the alter database clear logfile command and then restart the database with alter database open resetlogs.


    正确答案： C
    解析： 暂无解析

  • 第11题：

    多选题
    You are working on an Oracle Database 10g database. Because of data loss， you decided to perform a Flashback Database operation using the following command：  SQL> FLASHBACK DATABASE TO TIMESTAMP（SYSDATE ？5/24）； Which two statements are true？ （）
    A

    SYSDATE should not be used with TIMESTAMP.

    B

    The database must have multiplexed redo log files.

    C

    The database must be in the MOUNT state to execute the command.

    D

    The database must be opened with the RESETLOGS option after the flashback operation.

    E

    The entire database needs to be restored from the most recent backup before the flashback operation.


    正确答案： E,B
    解析： 暂无解析

  • 第12题：

    多选题
    Which two statements are true regarding the database in ARCHIVELOG mode？（）
    A

    You have to shut down the database to perform the backups.

    B

    Archiving information is written to the data files and redo log files.

    C

    You can perform complete database backups without closing the database.

    D

    Online redo log files have to be multiplexed before putting the database in ARCHIVELOG mode.

    E

    All the previous database backups become invalid after you configure the database to ARCHIVELOG mode.


    正确答案： E,C
    解析： 暂无解析

  • 第13题：

    After performing a clean shut down of the database instance for maintenance， you mount the database andthen execute a command to open the database：SQL> ALTER DATABASE OPEN； Which two statements are true（）

    • A、The online redo log files and online data files are opened.
    • B、All the online data file headers are checked for consistency.
    • C、Instance recovery is performed before opening the database.
    • D、The path and existence of all the log file members are checked

    正确答案:A,B

  • 第14题：

    You work as a database administrator for Supportcenter.cn. You started the instance using theinit.orafile. You have two control files and three redo log groups in your database. You decided to protect the database against failures by adding one more control file. Which file is the appropriate way to perform this task？（）

    • A、Shut down the instance， copy the control file to the third location and open the database.
    • B、Abort the instance， copy the control file to the third location， modify the CONTROL_FILES parameter in theinit.orafile and open the database.
    • C、Copy the control file to the third location， modify the CONTROL_FILES parameter in theinit.orafile， restart the instance and open the database.
    • D、Shut down the instance， copy the control file to the third location， modify the CONTROL_FILES parameter in theinit.orafile and open the database.
    • E、Shut down the instance， startup in the mount state， copy the control file to the third location， modify the CONTROL_FILES parameter ininit.oraand open the database.

    正确答案:D

  • 第15题：

    our database is in the MOUNT state and you execute the following command to open it：  ALTER DATABASE OPEN  What two actions are performed as a result of this command？（）

    • A、All control files are opened.
    • B、All redo log files are opened
    • C、The password file is opened.
    • D、The parameter file is opened.
    • E、All online data files are opened.

    正确答案:B,E

  • 第16题：

    The database is being restored from a closed backup. The data files， control files， password file， and parameter file are available， but the online redo logs are not. Because the online redo logs are not available， you must simulate recovery and alter the database open with the reset logs option so the online redo logs are created while the database opens. Which type of recover is used in this situation？（）

    • A、until SCN
    • B、until time
    • C、until cancel
    • D、using backup control file

    正确答案:C

  • 第17题：

    You have lost all your online redo logs. As a result， your database has crashed. You have tried to restart the database and clear the online redo log files， but when you try to open the database you get the following error.   SQL> startup ORACLE instance started.  Total System Global Area 167395328 bytes Fixed Size 1298612 bytes Variable Size 142610252 bytes Database Buffers 20971520 bytes Redo Buffers 2514944 bytes Database mounted.  ORA-00313： open failed for members of log group 2 of thread 1 ORA-00312： online log 2 thread 1： ，，/oracle01/oradata/orcl/redo02a.log ORA-27037： unable to obtain file status Linux Error： 2： No such file or directory Additional information： 3  ORA-00312： online log 2 thread 1： ，，/oracle01/oradata/orcl/redo02.log ORA-27037： unable to obtain file status Linux Error： 2： No such file or directory Additional information： 3  SQL> alter database clear logfile group 2； alter database clear logfile group 2 * ERROR at line 1：  ORA-01624： log 2 needed for crash recovery of instance orcl （thread 1） ORA-00312： online log 2 thread 1： ，，/oracle01/oradata/orcl/redo02.log ORA-00312： online log 2 thread 1： ，，/oracle01/oradata/orcl/redo02a.log   What steps must you take to resolve the error？（） a. Issue the recover database redo logs command.  b. Issue the Startup Mount command to mount the database.  c. Restore the last full database backup.  d. Perform a point-in-time recovery， applying all archived redo logs that are available.  e. Restore all archived redo logs generated during and after the last full database backup.  f. Open the database using the alter database open resetlogs command.  g. Issue the alter database open command.

    • A、b， a， f
    • B、e， b， a， f
    • C、e， b， a， g
    • D、b， a， g
    • E、c， e， b， d， f

    正确答案:E

  • 第18题：

    Two data files have been deleted at the operating system level by accident. Your database is running in ARCHIVELOG mode and online backups are taken nightly. One of the data files that has been deleted belongs to the USERS tablespace on the other belongs to the SYSTEM tablespace. How can you recover from this situation？（）

    • A、Shut down the database, restore the two data files and then start up the database. 
    • B、Take the system and users tablespace offline, restore the two data files, recover the two datafiles, and then bring the SYSTEM and USERS tablespaces online. 
    • C、Shut down the database, restore the two data files, start up the database in MOUNT mode, recover the two data files, and then alter the database open. 
    • D、Take the SYSTEM and USERS tablespaces offline, recover the two datafiles and then bring the SYSTEM and USERS tablespaces online.

    正确答案:C

  • 第19题：

    多选题
    our database is in the MOUNT state and you execute the following command to open it：  ALTER DATABASE OPEN  What two actions are performed as a result of this command？（）
    A

    All control files are opened.

    B

    All redo log files are opened

    C

    The password file is opened.

    D

    The parameter file is opened.

    E

    All online data files are opened.


    正确答案： D,E
    解析： 暂无解析

  • 第20题：

    多选题
    After performing a clean shut down of the database instance for maintenance， you mount the database andthen execute a command to open the database：SQL> ALTER DATABASE OPEN； Which two statements are true（）
    A

    The online redo log files and online data files are opened.

    B

    All the online data file headers are checked for consistency.

    C

    Instance recovery is performed before opening the database.

    D

    The path and existence of all the log file members are checked


    正确答案： C,A
    解析： 暂无解析

  • 第21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.


    正确答案： C
    解析： 暂无解析

  • 第22题：

    单选题
    You have to shut down the database instance with the ABORT option because of a hardware failure. Which statement is true about the subsequent opening of the database？（）
    A

    The database would open normally.

    B

    The database would not open， and it would stop at mount stage.

    C

    The database would open after automatically performing instance recovery.

    D

    The database would not open， and you have to perform database recovery to open it.


    正确答案： D
    解析： 暂无解析

  • 第23题：

    多选题
    After performing a clean shut down of the database instance for maintenance， you mount thedatabase and then execute a command to open the database： SQL> ALTER DATABASE OPEN；  Which two statements are true（）
    A

    The online redo log files and online data files are opened.

    B

    All the online data file headers are checked for consistency.

    C

    Instance recovery is performed before opening the database.

    D

    The path and existence of all the log file members are checked


    正确答案： D,C
    解析： 暂无解析

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