在单总线结构的CPU中,连接在总线上的多个部件()。
A、某一时刻只有一个可以向总线发送数据,并且只有一个可以从总线接收数据
B、某一时刻只有一个可以向总线发送数据,但可以有多个同时从总线接收数据
C、可以有多个同时向总线发送数据,并且可以有多个同时从总线接收数据
D、可以有多个同时向总线发送数据,但可以有一个同时从总线接收数据
Examine the following RMAN command: BACKUP DATABASE TAG TESTDB KEEP UNTIL ’SYSDATE+1’ RESTORE POINT TESTDB06; Which two statements are true regarding the backup taken by using the above RMAN command?()
AOnly data files and the control file are backed up.
BArchived redo logs are backed up only if the database is open during the backup.
CThe backup is deleted after one day,regardless of the default retention policy settings.
DThe backup becomes obsolete after one day,regardless of the default retention policy settings.
Which of the following ALTER DISKGROUP commands does not use V$ASM_OPERATION to record thestatus of the operation?()
A、ADD DIRECTORY
B、DROP DISK
C、RESIZE DISK
D、REBALANCE
E、ADD FAILGROUP
简述通道保护环和复用段保护环的区别。
机关、单位应当()所确定的国家秘密。对在保密期限内因保密事项范围调整不再作为国家秘密的事项,或者公开后不会损害国家安全和利益,不需要继续保密的,应当()。
A、定期审核;变更密级
B、不定期审核;解密
C、定期审核;及时解密
D、不定期审核;变更密级
不能将选定的内容复制到剪贴板的操作是()。
A、CTRL+B
B、CTRL+C
C、CTRL+X
D、“编辑”菜单中选“剪切”