假设磁盘块与缓冲区大小相同,每个盘块读入缓冲区的时间为100us,缓冲区送至用户区的时间是60us,系统对每个磁盘块数据的处理时间为50us。若用户需要将大小为10个磁盘块的File1文件逐块从磁盘读入缓冲区,并送用户区进行处理,那么采用单缓冲需要花费的时间为( )us;采用双缓冲需要花费的时间为( )us。
问题1选项
A.1000
B.1110
C.1650
D.2100
问题2选项
A.1000
B.1110
C.1650
D.2100
( )is the process of transforming information so it is unintelligible to anyone but the intended recipient.
As each application module is completed,it undergoes( )to ensure that it operates correctly and reliably.
( )algorithm specifies the way to arrange data in a particular order.
After analyzing the source code,( )generates machine instructions that will carry out the meaning of the program at a later time.
( )can help organizations to better understand the information contained within the data and will also help identify the data that is most important to the business and future business decisions.
浏览器开启无痕浏览模式后,( )依然会被保存下来。
下列协议中,不属于TCP/IP协议簇的是( )。
下列传输介质中,带宽最宽、抗干扰能力最强的是( )。
数控编程常需要用参数来描述需要加工的零件的图形。在平面坐标系内,确定一个点需要2个独立的参数,确定一个正方形需要( )个独立的参数。
某书的页码为1,2,3,...,共用数字900个(一个多位数页码包含多个数字),据此可以推断,该书最大的页码为( )。