A.the DBNEWID utility
B.the DBVERIFY utility
C.the ANALYZE command
D.the RMAN REPORT command
E.the RMAN CROSSCHECK command
F.the CHECK_OBJECT procedure of the DBMS_REPAIR package
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A.Flashback Table
B.Flashback Database
C.Flashback Versions Query
D.the RMAN REPORT command
E.the DBA_PENDING_TRANSACTIONS view
You executed the following query: SELECT operation, undo_sql, table_name FROM flashback_transaction_query;
Which statement is correct regarding the query output?()
A.It would return information regarding only the last committed transaction.
B.It would return only the active transactions in all the undo segments in the database.
C.It would return only the committed transactions in all the undo segments in the database.
D.It would return both active and committed transactions in all the undo segments in the database.
E.It would return information regarding the transactions that began and were committed in the last 30 minutes.
By mistake, you ran the batch job (for updating the BILL_DETAILS table) twice. You are not sure which rows in the BILL_DETAILS table were affected. You need to identify:
a) a list of changes made along with the transaction identifier of each change
b) the necessary SQL statements to undo the erroneous changes
Which option would you choose?()
A.RMAN only
B.Flashback Table only
C.Flashback Versions Query only
D.Flashback Database and Flashback Transaction Query
E.Flashback Versions Query and Flashback Transaction Query
View the Exhibits.
You performed operations on the DEPT4 table as shown in the Exhibit. When you perform the FlashbackVersions Query, you find that the first two updates are not listed. What could be the reason?()
A.The row movement is not enabled on the table.
B.The first two updates were not explicitly committed.
C.The Flashback Versions Query lists only the most recent update.
D.The Flashback Versions Query stops producing rows after it encounters a time in the past when the table structure was changed.
You are working in an online transaction processing (OLTP) environment. You realize that the salary for an employee, John, has been accidentally modified in the EMPLOYEES table. Two days ago, the data was in the correct state. Flashback logs generated during last two days are available in the flash recovery area.
Which option would you choose to bring the data to the correct state while ensuring that no other data in the same table is affected?()
A.perform point-in-time recovery
B.perform a Flashback Table operation to restore the table to the state it was in two days ago
C.perform a Flashback Database operation to restore the database to the state it was in two days ago
D.perform Flashback Versions Query and Flashback Transaction Query to determine all the necessary undo SQL statements, and then use them for recovery
A.UPDATE TABLE
B.CREATE CLUSTER
C.TRUNCATE TABLE
D.ALTER TABLE MOVE
E.INSERT INTO···VALUES
F.ALTER TABLE···DROP COLUMN
G.ALTER TABLE···DROP PARTITION
Why would you use the following FLASHBACK TABLE command?()
FLASHBACK TABLE emp TO TIMESTAMP (’11:45’,’hh12:mi’);
A.to undo the changes made to the EMP table since the specified time
B.to restore the EMP table that was wrongly dropped from the database
C.to view the transactions that have modified the EMP table since the specified time
D.to view the changes made to the EMP table for one or more rows since the specified time
E.to recover the EMP table to a point in time in the past by restoring the most recent backup
You are working in an online transaction processing (OLTP) environment. You used the FLASHBACK TABLE command to flash back the CUSTOMERS table. Before executing the FLASHBACK TABLE command, the System Change Number (SCN) was 663571. After flashing back the CUSTOMERS table,you realize that the table is not in the correct state and the resultant changes are not what you had desired. So, you need to reverse the effects of the FLASHBACK TABLE command while ensuring that:
a) No other user data in the database is affected.
b) The operation takes the minimum possible time.
Which option would you choose?()
A.use the ROLLBACK command with SCN 663571
B.perform Flashback Transaction Query with SCN 663571
C.execute the FLASHBACK DATABASE statement to retrieve the CUSTOMERS table as it was at SCN 663571
D.execute another FLASHBACK TABLE statement to retrieve the CUSTOMERS table as it was at SCN 663571
On Monday, you dropped the DEPT table from your schema and then you re-created the DEPT table in your schema. On Wednesday, you have a requirement to restore the DEPT table from the recycle bin.
Which statement is correct?()
A.You can restore the DEPT table by using the Oracle Flashback Drop feature, provided you use the RENAME TO clause.
B.You can restore the DEPT table by using the Oracle Flashback Drop feature and a system-generated name will be assigned to the restored table.
C.You cannot restore the DEPT table by using the Oracle Flashback Drop feature because a table with the name DEPT already exists in your schema.
D.You cannot restore the DEPT table by using the Oracle Flashback Drop feature because the contents of the recycle bin are purged every 12 hours by default.
These are the details about V$FLASHBACK_DATABASE_STAT:
SQL> DESC V$FLASHBACK_DATABASE_STAT Name Null? Type
------------- -------- --------------
BEGIN_TIME DATE END_TIME DATE
FLASHBACK_DATA NUMBER
DB_DATA NUMBER REDO_DATA NUMBER
ESTIMATED_FLASHBACK_SIZE NUMBER
Which two statements regarding the V$FLASHBACK_DATABASE_STAT view are true? ()
A.BEGIN_TIME is the time at which Flashback logging is enabled.
B.END_TIME is the time at which the query is executed on the view.
C.REDO_DATA is the number of bytes of redo data written during the interval.
D.This view contains information about flashback data pertaining to the last 24 hours.
E.FLASHBACK_DATA is the amount of flashback data generated since the database was opened.
最新试题
You are connected to Recovery Manager (RMAN) without a recovery catalog. There is no copy of the control file available. You want to restore the control file from an autobackup. To retrieve the autobackup,you need the database ID (DBID). In which two sources would you find the DBID? ()
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?()
You performed a backup of the flash recovery area by using the following command for the first time:RMAN> BACKUP RECOVERY AREA; Which files in the flash recovery area are backed up?()
You lost the index tablespace in your database. You are not able to use tablespace pointintime recovery on the index tablespace. What could be the reason for this?()
You have a readonly tablespace on readonly media. You want to perform a media recovery on the existing data files, but using a backup control file. The backup control file indicates that the status of the readonly tablespace was read/write when the control file was backed up. What should you consider?()
Your database operates in ARCHIVELOG mode and usermanaged consistent backups are performed every Sunday night. On Tuesday, at 9:00 a.m. the current log sequence number was 369. Also, on Tuesday you lost the data file belonging to the SYSTEM tablespace and an archivelog file (sequence number 356) that contained redo entries between 8:00 a.m. and 8:30 a.m. With reference to this scenario, what would you do to recover the database?()
You have only two redo log groups and these groups get overwritten several times in a day. Your database operates in NOARCHIVELOG mode and usermanaged consistent backups are performed every Sunday night. On Thursday morning, you find that an important table has been dropped and purged. With reference to this scenario, up to what point in time can the data be recovered?()
You are using Oracle Database 10g. The LOG_ARCHIVE_FORMAT parameter is set to ’LOG%t_%s_%r.dbf’. Why is %r used in the file name format?()
Consider the recovery steps in each of the cases given below: Case 1: Shut down the database and perform a backup. Restore all the data files. Mount the database. Recover the database. Without applying all the redo log files, open the database using the RESETLOGS option. Back up the database. Case 2: Shut down the database and perform a backup. Restore only the data files of the tablespace where user error damaged the data. Mount the database. Recover the database. Open the database with the RESETLOGS option. Back up the database. Case 3:Shut down the database Restore the data files Open the database Perform recovery to the current point in time. Which case has the correct steps for an incomplete recovery?()
You executed the following query in your database: FROM V$FLASHBACK_DATABASE_LOG; What would you determine from the output?()