知识大全 1Z0-025 经典考试回忆

Posted 2022-07-15 知

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　　覆蓋率可以不过答案不是很准确　　　　 What are o benefits of making recovery operations parallel? (Choose o) 　　Answer: Recovering more than one data file 　　 With the instance down how would you recover a lost control file? 　　Answer: Use the CREATE CONTROLFILE mand 　　 You are restoring a backup data file to a different location To recover 　　successfully what must you do? 　　Answer: Use the ALTER DATABASE mand to rename the data file 　　 Which o benefits does the mand ALTER DATABASE MOUNT 　　CLOSE DATABASE offer for the tablespace point in time recovery? 　　(Choose o) 　　Answer: It prevents accidental corruption of the primary database 　　It allows you to remove a data file that has been added to the wrong tablespace 　　 Which statement about cancel based recovery is true? 　　Answer: Recovery is stopped by entering CANCEL at the recovery prompt 　　 A media management layer is always used when Recovery Manager 　　________ 　　Answer: Performs media recovery 　　 Why would you set a data file offline when the database is in MOUNT state? 　　Answer: To allow for automatic data file recovery 　　 When configuring a database in ARCHIVELOG mode and enabling automatic archiving the database must be shut down and opened in the MOUNT stage Which three options can be used to do this? (Choose Three) 　　Answer: SHUTDOWN NORMAL AND STARTUP MOUNT 　　SHUTDOWN IMMEDIATE AND STARTUP MOUNT 　　SHUTDOWN TRANSACTIONAL AND STARTUP MOUNT 　　 When configuring a database in ARCHIVELOG mode and enabling automatic archiving the database must be shut down and opened in the MOUNT stage Which o options should not be used to do this? (Choose o) 　　Answer: STARTUP FORCE MOUNT 　　SHUTDOWN ABORT and STARTUP MOUNT 　　 What is the correct procedure for multiplexing existing online redo logs? 　　Answer: Issue the ALTER DATABASE ADD LOGFILE MEMBER mand 　　 In the view V$DATAFILE_HEADER what does value YES in the FUZZY column as specified? 　　Answer: The data file is in backup mode 　　 During an opened database backup a power failure occurs Which SQL statement do you issue to resolve this situation after mounting the database? 　　Answer: ALTER DATABASE DATAFILE n END BACKUP 　　 You perform an inplete recovery using RMAN You write the following 　　script: 　　RUN 　　SET UNTIL TIME = yyyy nm dd:hh:mi:ss ; 　　RESTORE DATABASE; 　　RECOVER DATABASE; 　　SQL alter database open resetlogs ; 　　Which mand is missing? 　　Answer: RELEASE CHANNEL 　　 Which statement regarding Recovery Manager with a database operating in 　　NOARCHIVELOG mode is true? 　　Answer: Recovery Manager supports multi level incremental backups 　　 After rebuilding the recovery catalog by resynchronizing it with a copy of the backup control file you notice references to files that no longer exist Which CRETAE mand clause should you use to remove these references? 　　Answer: UNCATALOG 　　 When configuring a database for ARCHIVELOG mode you use initialization parameter to specify which o actions? (Choose o) 　　Answer: Where log files will be archived The names that will be given to archived log files 　　 A tablespace bees unavailable because of a failure The database is 　　running in NOARCIVELOG mode? What should the DBA do to make the database available? 　　Answer: Restore the data files redo log files and control files from an earlier copy of a full database backup 　　 In which situation would you need to create a new control file for an existing 　　database? 　　Answer: When MAXLOGMEMBERS needs to be changed 　　 Why would a DBA load a table using the NOLOGGING options? 　　Answer: To reduce redo during a direct loaded operation 　　 Which technique does Oracle use to perform full backups of data files? 　　Answer: The server process reads the entire file and skips blocks that have never 　　been used 　　 Which statement regarding the allocation of processes to Recovery Manager is true? 　　Answer: Setting BACKUP_TAPE_IO_SLAVES=TRUE will enable a dedicated 　　slave to write to a tape device 　　 What is the effect of issuing an ALTER DATABASE OPEN RESETLOGS mand on the primary database? 　　Answer: It invalidates the standby database 　　 In order to keep a standby database up to date archived redo log files need 　　to be transferred from the primary to the standby server What are o ways 　　to do this? (Choose o) 　　Answer: Specify LOG_SARCHIVE_DEST_n on the standby database 　　 When configuring a database for ARCHIVELOPG mode you use an initialisation parameter to specify which action? 　　Answer: That the database is in ARCHIVELOG mode 　　 You have just created a script in Recovery Manager After noticing an error 　　in the script you decide to recreate it Which mand replaces the stored script in the recovery catalog? 　　Answer: REPLACE_SCRIPT 　　 When o or more databases are backed up using RMAN is it appropriate 　　to use each database as the other s recovery catalog? Why? 　　Answer: No A database that contains a catalog cannot be target database 　　 What is the advantage of managed recovery mode? 　　Answer: The standby database automatically applies the archived redo log when the 　　files bee available 　　 Which import option do you use to create tables without data? 　　Answer: ROWS 　　 Which statement is true when using the LogMiner utility? 　　Answer: The dictionary file is created in a directory as defined as defined by 　　UTL_FILE_DIR 　　 The developers have implemented parallel DML operations How can a DBA 　　make sure that the archiving process is able to keep up with archiving the redo log files? 　　Answer: Spawn multiple database writers 　　 Which action does Oracle remend after a DBA recovers from the loss of 　　the current online redo log? 　　Answer: Back up the instance 　　Back up the control file 　　 What is the last step when setting up a recovery catalog? 　　Answer: Run the REGISTER DATABASE mand 　　 What is the difference beeen using NOLOGGING operations in a single 　　database environment and a standby database environment? 　　Answer: NOLOGGING operations can be used on the standby database but not on the primary database 　　 What is the function of SMON in instance recovery? 　　Answer: It roles forward by applying changes in the redo log 　　 What are o causes of user errors? (Choose o) 　　Answer: Incorrect data is mitted 　　A table is accidentally truncated 　　 Which statement is true when using the DELIVERY utility to detect corruptions in an Oracle data block? 　　Answer: The utility can be used to verify the data files of a backup database 　　 The alert log can contain specific information about which database backup activity? 　　Answer: Placing tablespace in begin and end backup mode 　　 In which o situations would you have to apply redo information to a read only 　　tablespace? (Choose o) 　　Answer: When the tablespace being recovered is writeable but was read only when the last backup occurred 　　When the tablespace being recovered is read only but was writeable when the last backup occurred 　　　　 Your database is configured in ARCHIVELOG mode Which three types of 　　backups can be performed? (Choose three) 　　Answer: Open database backups 　　Operating system back cha138/Article/program/Oracle/201311/18673