单选题Which statement is true about the loss of system-critical data files in ARCHIVELOG mode？（）A The data files can be recovered till the last committed transaction.B The data files can be recovered without shutting down the database.C The data file is take

题目
单选题
Which statement is true about the loss of system-critical data files in ARCHIVELOG mode？（）
A

The data files can be recovered till the last committed transaction.

B

The data files can be recovered without shutting down the database.

C

The data file is taken offline automatically； the database remains open.

D

The data files can be recovered to the time of the most recent backup.

相似考题

1.You issued the following commands to configure setting in RMAN;Then you issued the following command to take the backup:RMAN> BACKUP DATABASE PLUS ARCHIVELOG;Which statement is true about the execution of the above command?（）A. The backup will terminate because the FORMAT clause was not configured for the channelB. It backs up two copies of data files to tape and disk, and two copies of archived log file on tapeC. It backs up the data files and archived log files to disk, making two copies of each data file and archived log fileD. It backs up the data files and archived log files to tape, making two copies of each data file and archived log file

2. Your test database is configured to run in NOARCHIVELOG mode. One of the data files in the USERS tablespace is lost due to a media failure. You notice that all the online redo logs have been overwritten sincethe last backup.  What would you do to recover the data file（）A、Take the USERS tablespace offline and re-create the lost data file.B、Shut down the instance， restore the data file from the last consistent backup， and restart the databaseinstance.C、Shut down the instance， restore all the database files from the last consistent backup， and restart thedatabase instance.D、Take the USERS tablespace offline， restore all the data files of the USERS tablespace from the lastconsistent backup， and make the tablespace online

3.Which statement is true regarding the Archiver （ARCn） process，archived log files，and recovery？ （）A、A database backup, combined with archived redo log files, guarantees that all committed data can be recovered to the point of failure. B、During recovery the ARCn background process copies its redo entries identified for recovery by the control file to the data files. C、After each write to an archived log, the mandatory background process ARCn writes its log sequence number and the first and last SCN number within the log sequence to the control file. D、At database recover time, and archived redo log is uniquely identified for recovery use by its redo thread number and destination ID number retrieved from the control file.

4.Which two statements correctly describe the relation between a data file and the logical databasestructures（）A、An extent cannot spread across data files.B、A segment cannot spread across data files.C、A data file can belong to only one tablespace.D、A data file can have only one segment created in it.E、A data block can spread across multiple data files as it can consist of multiple operating system （OS） blocks.

更多“单选题Which statement is true about the loss of system-critical data files in ARCHIVELOG mode？（）A The data files can be recovered till the last committed transaction.B The data files can be recovered without shutting down the database.C The data file is take”相关问题

  • 第1题：

    Which  statements are true about checkpointing（）

    • A、The checkpoint frequency decreases with the smaller redo log file size.
    • B、It ensures that all committed data is written to the data files during normal shutdown.
    • C、The frequent full checkpoint in a database can cause the overall degradation of the database performance.
    • D、It prompts the Checkpoint （CKPT） process to write data to the data files and redo information to the onlineredo log files

    正确答案:B,C

  • 第2题：

    Data files of which three tablespaces can be recovered by performing an openrecovery？（）

    • A、TEMP
    • B、UNDO
    • C、INDEX
    • D、SYSAUX
    • E、SYSTEM

    正确答案:A,C,D

  • 第3题：

    Which statement is true about the loss of system/x7fcritical data files in ARCHIVELOG mode？（）

    • A、The data files can be recovered till the last committed transaction.
    • B、The data files can be recovered without shutting down the database.
    • C、The data file is taken offline automatically; the database remains open.
    • D、The data files can be recovered to the time of the most recent backup.

    正确答案:A

  • 第4题：

    Which statement is true about a whole consistent database backup on a database running in ARCHIVELOG mode（）

    • A、The backup will consist of used data blocks only.
    • B、The database must be shut down to accomplish the backup.
    • C、The backup can be accomplished without shutting down the database.
    • D、The backup will contain all database files that have never been backed up.

    正确答案:B

  • 第5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6题：

    View this parameter setting in your database：   DB_CREATE_FILE_DEST=’D:// /oracle/product/10.2.0/oradata/oracle’  You created a tablespace by using this command：   CREATE TABLESPACE USERS；  Which two statements are true about the USERS tablespace？（）

    • A、The tablespace has two data files.
    • B、An error is reported and tablespace creation fails.
    • C、Data files are created with names generated by the instance.
    • D、The tablespace can be extended without specifying the data file.
    • E、Data files belonging to the USERS tablespace cannot be renamed.

    正确答案:C,D

  • 第7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8题：

    单选题
    You issued the following commands to configure setting in RMAN; Then you issued the following command to take the backup: RMAN> BACKUP DATABASE PLUS ARCHIVELOG; Which statement is true about the execution of the above command?（）
    A

    The backup will terminate because the FORMAT clause was not configured for the channel

    B

    It backs up two copies of data files to tape and disk, and two copies of archived log file on tape

    C

    It backs up the data files and archived log files to disk, making two copies of each data file and archived log file

    D

    It backs up the data files and archived log files to tape, making two copies of each data file and archived log file


    正确答案： D
    解析： 暂无解析

  • 第9题：

    多选题
    Your database is configured in NOARCHIVELOG mode. All the control files have been lost due to a hard disk failure but the data files are not lost. You have the closed whole database backup available to you. Which two statements are true in this scenario？（）
    A

    The instance aborts.

    B

    The database cannot be recovered.

    C

    The database can be recovered by restoring the control files from the backup.

    D

    The database remains opened and you have to shut it down with the ABORT option.

    E

    The database can be restored till the point of the last closed whole database backup.


    正确答案： A,E
    解析： 暂无解析

  • 第10题：

    单选题
    Which statement is true about a whole consistent database backup on a database running in ARCHIVELOGmode（）
    A

    The backup will consist of used data blocks only.

    B

    The database must be shut down to accomplish the backup.

    C

    The backup can be accomplished without shutting down the database.

    D

    The backup will contain all database files that have never been backed up


    正确答案： A
    解析： 暂无解析

  • 第11题：

    多选题
    Which two statements correctly describe the relation between a data file and the logical database structures（）
    A

    An extent cannot spread across data files.

    B

    A segment cannot spread across data files.

    C

    A data file can belong to only one tablespace.

    D

    A data file can have only one segment created in it.

    E

    A data block can spread across multiple data files as it can consist of multiple operating system （OS）blocks


    正确答案： B,C
    解析： 暂无解析

  • 第12题：

    单选题
    Which statement is true regarding the Archiver （ARCn） process，archived log files，and recovery？ （）
    A

    A database backup, combined with archived redo log files, guarantees that all committed data can be recovered to the point of failure. 

    B

    During recovery the ARCn background process copies its redo entries identified for recovery by the control file to the data files. 

    C

    After each write to an archived log, the mandatory background process ARCn writes its log sequence number and the first and last SCN number within the log sequence to the control file. 

    D

    At database recover time, and archived redo log is uniquely identified for recovery use by its redo thread number and destination ID number retrieved from the control file.


    正确答案： A
    解析： 暂无解析

  • 第13题：

    Your database is configured in NOARCHIVELOG mode. All the control files have been lost due to a hard disk failure but the data files are not lost. You have the closed whole database backup available to you.  Which two statements are true in this scenario？（）

    • A、The instance aborts.
    • B、The database cannot be recovered.
    • C、The database can be recovered by restoring the control files from the backup.
    • D、The database remains opened and you have to shut it down with the ABORT option.
    • E、The database can be restored till the point of the last closed whole database backup.

    正确答案:A,E

  • 第14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:C,E

  • 第15题：

    You are working on a database that must be functioning 24 hours a day， 7 days a week. The databaseis configured in ARCHIVELOG mode.  Which two options do you have for performing user-managed backups（）

    • A、You can perform consistent backups only.
    • B、You can perform a complete database backup without shutting down the database instance.
    • C、You can back up data files only when all data files have the same SCN recorded in the control file.
    • D、You can back up only those data files whose headers are frozen by using ALTER TABLESPACE BEGINBACKUP or ALTER DATABASE BEGIN BACKUP commands.

    正确答案:B,D

  • 第16题：

    Which two statements are true about checkpointing（）

    • A、The checkpoint frequency decreases with the smaller redo log file size.
    • B、It ensures that all committed data is written to the data files during normal shutdown.
    • C、The frequent full checkpoint in a database can cause the overall degradation of the database performance.
    • D、It prompts the Checkpoint （CKPT） process to write data to the data files and redo information to the online redo log files.

    正确答案:B,C

  • 第17题：

    Which statement is true about the loss of system-critical data files in ARCHIVELOG mode？（）

    • A、The data files can be recovered till the last committed transaction.
    • B、The data files can be recovered without shutting down the database.
    • C、The data file is taken offline automatically； the database remains open.
    • D、The data files can be recovered to the time of the most recent backup.

    正确答案:A

  • 第18题：

    Data files of which three tablespaces can be recovered by performing an open recovery？（）

    • A、TEMP
    • B、UNDO
    • C、INDEX
    • D、SYSAUX
    • E、SYSTEM

    正确答案:A,C,D

  • 第19题：

    单选题
    Which statement is true about the loss of system/x7fcritical data files in ARCHIVELOG mode？（）
    A

    The data files can be recovered till the last committed transaction.

    B

    The data files can be recovered without shutting down the database.

    C

    The data file is taken offline automatically; the database remains open.

    D

    The data files can be recovered to the time of the most recent backup.


    正确答案： A
    解析： 暂无解析

  • 第20题：

    多选题
    Which  statements are true about checkpointing（）
    A

    The checkpoint frequency decreases with the smaller redo log file size.

    B

    It ensures that all committed data is written to the data files during normal shutdown.

    C

    The frequent full checkpoint in a database can cause the overall degradation of the database performance.

    D

    It prompts the Checkpoint （CKPT） process to write data to the data files and redo information to the onlineredo log files


    正确答案： C,B
    解析： 暂无解析

  • 第21题：

    单选题
    Which statement is true about a whole consistent database backup on a database running in ARCHIVELOG mode（）
    A

    The backup will consist of used data blocks only.

    B

    The database must be shut down to accomplish the backup.

    C

    The backup can be accomplished without shutting down the database.

    D

    The backup will contain all database files that have never been backed up.


    正确答案： B
    解析： 暂无解析

  • 第22题：

    多选题
    Data files of which three tablespaces can be recovered by performing an openrecovery？（）
    A

    TEMP

    B

    UNDO

    C

    INDEX

    D

    SYSAUX

    E

    SYSTEM


    正确答案： E,C
    解析： 暂无解析

  • 第23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

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