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问题 单项选择题

在（）的情况下死锁发生。

A．计算机系统发生了重大故障

B．有多个封锁的进程同时存在

C．若干进程因竞争资源而无休止地相互等待对方释放已占有的资源

D．资源数大大小于进程数，或进程同时申请的资源数大大超过资源总数

答案

参考答案：C

解析：

产生死锁的4个必要条件为：互斥条件、请示保持条件、不可剥夺条件和环路条件，概括起来说就是循环调用被占用资源，所以选C。

解答题

一个圆柱形的薯片包装盒，高是2.5分米，底面半径是3厘米．如果沿包装盒的一周贴上高度为5厘米的商标纸，商标纸的面积应是多少平方厘米？
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单项选择题

Initiating process group consists of the processes that facilitate the formal authorization to satart a new project or a project phase. Initiating processes are often done external to the project’s scope of control by the organization or by a program or portfolio processes which may blur the project boundaries for project inputs. Before beginning the initiation process group, ______.

A．a scope management plan is created to document how the project scope will be defined, verified and controlled

B．a project management plan is developed

C．specific activities that need to be performed to produce the various project deliverables are determined

D．none of the above
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