______is a property of object-oriented software by which an abstract operation may be performed in different ways in different classes．
A．Method
B．Polymorphism
C．Inheritance
D．Encapsulation
Software entities are more complex for their size than perhaps any other human construct, because no two parts are alike (at least above the statement level). If they are, we make the two similar parts into one, a（71 ）, open or closed. In this respect software systems differ profoundly from computers,buildings, or automobiles, where repeated elements abound.Digital computers are themselves more complex than most things people build; they have very large numbers of states. This makes conceiving, describing, and testing them hard. Software systems have orders of magnitude more （72 ）than computers do.Likewise, a scaling-up of a software entity is not merely a repetition of the same elements in larger size; it is necessarily an increase in the number of different elements. In most cases, the elements interact with each other in some（ 73 ）fashion,and the complexity of the whole increases much more than linearly.The complexity of software is a(an)（74 ）property, not an accidental one. Hence descriptions of a software entity that abstract away its complexity often abstract away its essence.Mathematics and the physical sciences made great strides for three centuries by constructing simplified models of complex phenomena, deriving properties from the models, and verifying those properties experimentally. This worked because the complexities（75 ）in the models were not the essential properties of the phenomena. It does not work when the complexities are the essence.Many of the classical problems of developing software products derive from this essential complexity and its nonlinear increases with size. Not only technical problems but management problems as well come from the complexity.A.states B.parts C.conditions D.expressions
点击查看答案
（ ） is a property of object-oriented software by which an abstract operation may be performed in different ways in different classes. A.MethoD.B.Polymorphism C.Inheritance D.Encapsulation
LTE网管上Configuration有哪些功能应用（）A、CM operation managerB、Software ManagerC、CM editorD、License Manager
Which two statements are true？（）A、 An inner class may be declared as static.B、 An anonymous inner class can be declared as public.C、 An anonymous inner class can be declared as private.D、 An anonymous inner class can extend an abstract class.E、 An anonymous inner class can be declared as protected.
Which of the following statements concerning intellectual property is wrong？（）A、Intellectual property is an intangible creationB、Intellectual property in ludes patents，trademarks，copyrights，etc.C、Intellectual property is a visible creationD、There are some agreement sconcerning intellectual property under the WTO
Which of the following are attributes of a hardware-based RAID controller？（）A、Backs up dataB、Less expensive than software RAIDC、Vendor neutral implementationD、Accessible through a BIOS interfaceE、More host CPU usage than software RAIDF、Accessible through a system utility after the OS has been loadedG、May retain data in the event of a power outage
Which of the following options indicates why it is important to talk to the user and ask appropriate questions about a software problem? （）A、Software problems don't generate errors. B、The user is more knowledgeable about software. C、The system logs will provide useful information alone. D、Key information pertaining to the software may be uncovered.
