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单选题
Which statement is true regarding checkpoints and recovery？（）
A
A checkpoint defines the highest system change number （SCN）.
B
All redo entries higher or at the SCN are known to be written to the data files.
C
Only the redo records containing SCNs higher then the checkpoint need to be applied during recovery.
D
The LOG_CHECKPOINT_INTERVAL initialization parameter specifies the amount of time between incremental checkpoints.
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更多 “单选题Which statement is true regarding checkpoints and recovery？（）A A checkpoint defines the highest system change number （SCN）.B All redo entries higher or at the SCN are known to be written to the data files.C Only the redo records containing SCNs higher then the checkpoint need to be applied during recovery.D The LOG_CHECKPOINT_INTERVAL initialization parameter specifies the amount of time between incremental checkpoints.” 相关考题
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You are using Oracle Database 10g. You performed an incomplete recovery of your database and opened the database with the RESETLOGS option. What is the effect of opening the database with the RESETLOGS option？（）A、This operation resets the SCN for the database.B、This operation creates a new incarnation of the database.C、This operation moves all the redo log files to a different location.D、This operation deletes the old redo log files and creates new redo log files.E、This operation updates all current datafiles and online redo logs and all subsequent archived redo logs with a new RESETLOGS SCN and time stamp.
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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.
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Your database operates in ARCHIVELOG mode and all the tablespaces are online. Due to a user error， you decided to perform an incomplete recovery. Which two tasks would you be required to perform in the recovery process？ （）A、open the database with the RESETLOGS optionB、open the database with the RESTRICTED optionC、recover all the data files to the same system change number （SCN）D、recover to the required SCN only that data file in which the error occurred
考题
The instance abnormally terminates because of a power outage. Which statement is true about redolog files during instance recovery（）A、Inactive and current redo log files are required to accomplish recovery.B、Online and archived redo log files are required to accomplish instance recovery.C、All redo log entries after the last checkpoint are applied from redo log files to data files.D、All redo log entries recorded in the current redo log file until the checkpoint position are applied to datafiles.
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Which statement is true regarding checkpoints and recovery？（）A、A checkpoint defines the highest system change number （SCN）.B、All redo entries higher or at the SCN are known to be written to the data files.C、Only the redo records containing SCNs higher then the checkpoint need to be applied during recovery.D、The LOG_CHECKPOINT_INTERVAL initialization parameter specifies the amount of time between incremental checkpoints.
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The loss of which two types of files may require a recovery with the RESETLOGS option？（）A、 control filesB、 password fileC、 archived log filesD、 system-critical data files for which all the redo entries are presentE、 non-system-critical data files for which all the redo entries are present
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Your boss at Supportcenter.cn wants you to clarify Oracle 10g. Which statement regarding the usage of redo log files during instance recovery is true？ （）A、Transactions are rolled back using redo log files.B、Transactions are rolled forward using redo log files.C、Transactions are rolled back using redo log files and archived log files.D、Transactions are rolled forward using redo log files and rolled back using redo log files.
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You are using Oracle Database 10g. Which statement regarding an incomplete recovery is true？（）A、 You do not need to restore all the data files.B、 You do not need to open the database with the RESETLOGS operationC、 You do not need to perform a full backup after the RESETLOGS operation.D、 You do not need to recover all the data files to the same system change number （SCN）.
考题
单选题Which statement correctly describes the change tracking writer （CTWR） background process？（）A
It keeps track of changes in the background processes.B
It records the system change number （SCN） in the control file.C
It writes audit records for user changes to the change tracking file.D
It records any changes to the listened configuration in the listener.ora file.E
It records any changes to the database parameters in the change tracking file.F
It records the physical location of all the changes that are made to the database in the change tracking file.
考题
单选题The instance abnormally terminates because of a power outage. Which statement is true about redolog files during instance recovery（）A
Inactive and current redo log files are required to accomplish recovery.B
Online and archived redo log files are required to accomplish instance recovery.C
All redo log entries after the last checkpoint are applied from redo log files to data files.D
All redo log entries recorded in the current redo log file until the checkpoint position are applied to datafiles.
考题
单选题Which statement is true regarding checkpoints and recovery？（）A
A checkpoint defines the highest system change number （SCN）.B
All redo entries higher or at the SCN are known to be written to the data files.C
Only the redo records containing SCNs higher then the checkpoint need to be applied during recovery.D
The LOG_CHECKPOINT_INTERVAL initialization parameter specifies the amount of time between incremental checkpoints.
考题
多选题The loss of which two types of files may require a recovery with the RESETLOGS option？（）Acontrol filesBpassword fileCarchived log filesDsystem-critical data files for which all the redo entries are presentEnon-system-critical data files for which all the redo entries are present
考题
单选题In your production database, users report that they are unable to generate reports on an important table because it does not contain any data. While investigating the reason, you realize that another user executed the TRUNCATE TABLE command, which accidentally caused the data to be lost. Now you want to recover the lost data of the table without affecting objects in other schemas. Which method must you use to recover the lost data?（）A
Complete Recovery with online redo logB
Complete Recovery with archived redo logC
Tablespace Point-in-Time Recovery (TSPITR)D
Incomplete Recovery with system change number (SCN)
考题
单选题You are using Oracle Database 10g. Which statement regarding an incomplete recovery is true？（）A
You do not need to restore all the data files.B
You do not need to open the database with the RESETLOGS operationC
You do not need to perform a full backup after the RESETLOGS operation.D
You do not need to recover all the data files to the same system change number （SCN）.
考题
多选题Which statements are true about checkpointing（）AThe checkpoint frequency decreases with the smaller redo log file size.BIt ensures that all committed data is written to the data files during normal shutdown.CThe frequent full checkpoint in a database can cause the overall degradation of the database performance.DIt prompts the Checkpoint （CKPT） process to write data to the data files and redo information to the onlineredo log files
考题
单选题The instance abnormally terminates because of a power outage. Which statement is true about redo log filesduring instance recovery（）A
Inactive and current redo log files are required to accomplish recovery.B
Online and archived redo log files are required to accomplish instance recovery.C
All redo log entries after the last checkpoint are applied from redo log files to data files.D
All redo log entries recorded in the current redo log file until the checkpoint position are applied to data files
考题
多选题Which two statements are true about checkpointing（）AThe checkpoint frequency decreases with the smaller redo log file size.BIt ensures that all committed data is written to the data files during normal shutdown.CThe frequent full checkpoint in a database can cause the overall degradation of the database performance.DIt prompts the Checkpoint （CKPT） process to write data to the data files and redo information to the online redo log files.
考题
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.
考题
单选题In your production database， users report that they are unable to generate reports on an important table because it does not contain any data. While investigating the reason， you realize that another user executed the TRUNCATE TABLE command， which accidentally caused the data to be lost. Now you want to recover the lost data of the table without affecting objects in other schemas. Which method must you use to recover the lost data？（）A
Complete Recovery with online redo logB
Complete Recovery with archived redo logC
Tablespace Point-in-Time Recovery （TSPITR）D
Incomplete Recovery with system change number （SCN）
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