内存管理 Autorelease、retain、copy、assign的set方法和含义？
内存管理 Autorelease、retain、copy、assign的set方法和含义？
相关考题：
工资数据库文件GZ．DBF和相应的索引文件已经打开，下列操作中错误的是( )。A．SET INDEX TeB．COPY T0 NEW1 FOR基本工资=1000C．COPY STRUCTURE T0 NEW2D．COPY FILE T0 NEW3.DBF
现网一台基于windows 2003 server操作系统的主机,需要停止业务进行升级,为保证内存中数据的安全,可采用以下哪条命令将内存中的数据写入到硬盘的D盘分区() A. copy.exe -c D:B. copy.exe -r D:C. copy.exe -c D:D. sync.exe -r D:
You need to upgrade the IOS of an existing router on your network. The new IOS image is located on a TFTP server that you have set up within the network. What command should you issue in order to download the new IOS version?（）A、Router# copy tftp flashB、Router# copy flash runC、Router(config)# restore flashD、Router(config)# repair flashE、Router#copy flash tftpF、Router# copy start flash
现网一台基于windows 2003 server操作系统的主机，需要停止业务进行升级，为保证内存中数据的安全，可采用以下哪条命令将内存中的数据写入到硬盘的D盘分区（）A、copy.exe -c D:B、copy.exe -r D:C、copy.exe -c D:D、sync.exe -r D:
You have an Exchange Server 2010 organization that contains 20 mailbox databases. You configure each database to retain all deleted items for 30 days.You need to ensure that all items that pass the retention period are permanently deleted daily between 02：00 and 06：00. Which cmdlet should you use？（）A、Set-MailboxDatabaseB、Set-MailboxServerC、Set-OrganizationConfigD、Set-RetentionPolicy
We are enclosing a full set of copy documents ______this first consignmentA、referringB、coveringC、regarding toD、as for
During a boot, which of the following procedures is most likely to present a menu that prompts the user to copy a dump?（）A、 Set the dump device to /dev/hd6. B、 Run sysdumpdev to set the force copy flag for dump to true. C、 Run sysdumpdev to set the force copy flag for dump to false. D、 Increase space in the /tmp directory.
What is an obsolete backup set？（） A、 A backup set that is missing one or more backup set piecesB、 A backup that has exceeded the retention criteria and is no longer neededC、 A backup set that does not include archived redo logsD、 A backup set that can not be recovered due to corruptionE、 A backup set superceded by a datafile copy
Which of the following views must you query to identify any corrupt data file blocks that have been detected during backup set creation？（）A、V$COPY_CORRUPTB、V$COPY_CORRUPTIONC、V$BACKUP_CORRUPTD、V$BACKUP_CORRUPTION
When CONFIGURE CONTROLFILE AUTOBACKUP is set to ON， RMAN automatically performs a control file autobackup in which three situations？（）A、At the end of every RUN block. B、After every SET CONTROLFILE AUTOBACKUP FORMAT command. C、After every BACKUP or COPY command issued at the RMAN prompt. D、At the end of every RUN block if the last command in the block was either BACKUP or COPY. E、Whenever a BACKUP or COPY command within a RUN block is followed by a command that is neither BACKUP nor COPY. F、After every BACKUP or COPY command within a RUN block that is followed by the CONFIGURE CONTROLFILE AUTOBACKUP FORMAT command.
You want to perform a backup of your database to tape. Which backup format can you use？（）A、backup set onlyB、image copy onlyC、only user-managed backupD、both image copy and backup setE、only incremental image copy backup
单选题What is an obsolete backup set？（）A A backup set that is missing one or more backup set piecesB A backup that has exceeded the retention criteria and is no longer neededC A backup set that does not include archived redo logsD A backup set that can not be recovered due to corruptionE A backup set superceded by a datafile copy
单选题During a boot, which of the following procedures is most likely to present a menu that prompts the user to copy a dump?（）A Set the dump device to /dev/hd6. B Run sysdumpdev to set the force copy flag for dump to true. C Run sysdumpdev to set the force copy flag for dump to false. D Increase space in the /tmp directory.
单选题You want to perform a backup of your database to tape. Which backup format can you use？（）Abackup set onlyBimage copy onlyConly user-managed backupDboth image copy and backup setEonly incremental image copy backup
单选题You need to upgrade the IOS of an existing router on your network. The new IOS image is located on a TFTP server that you have set up within the network. What command should you issue in order to download the new IOS version?（）ARouter# copy tftp flashBRouter# copy flash runCRouter(config)# restore flashDRouter(config)# repair flashERouter#copy flash tftpFRouter# copy start flash