以下选项中,属于死锁产生的必要条件的是?
概念:当若干个进程互相竞争对方占有的资源,并无限期地等待,导致不能向前推进。死锁是系统的一种出错的状态,应该尽量预防和避免。
产生原因:供共享的系统资源不足,资源分配策略和进程的推进顺序不当。
产生的必要条件:互斥条件,保持和等待条件,不剥夺条件和环路等待。
( )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( )。