Which of the following statements about object oriented database is NOT correct ?

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问题 Which of the following statements about object oriented database is NOT correct ?

选项 A、Each object has a unique object identity in the system
B、Encapsulation and inheritance are two important features of object oriented database
C、A subclass can inherit the attributes and methods of all its superclasses
D、A superclass includes the attributes and methods of all its subclasses

答案D

解析

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笔试

原NCRE全国计算机四级

NCRE全国计算机四级

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Which of the following statements about object oriented database is NOT correct ?

笔试

原NCRE全国计算机四级

NCRE全国计算机四级

The______has several major components, including the system kernel, a memory management system, the file system manager, device

White box testing of software testing is a test for software structure. Which of the following item should not be included in th

The(71) program is generally translated to an object program, which is in a form directly understandably by the computer。

To verify that your printer is operating correctly, you can run the printer(75)program。

Which of the following indicate(s)possible values for the variables when the segment finishes execution?(74). Ⅰ. x=1,y=2

The(72)is a collection of modules serving as interface between hardware and software to provide a software platform．

Very brief, simple expressions in program are easy to write correctly and effortless to(4).

Theterm“software________________”isusedtodescribethesoftwareengineeringactivitiesthatoccurfollowingdeliveryofas

用变量代换x=lnt将方程d2y/dx2-dy/dx+e2xy=0化为y关于t的方程，并求原方程的通解．

EducationhasaveryhonoredplaceinAmericansocietyand,withsomeexceptionsamongthewealthy,parentsofeverykindofbac

Ittakesalongtimetogrowatree.Howlong?Well,pinetreesarethequickestgrowingtrees,butstill,theytaketwentyyear

枕左前位胎头进入骨盆时，衔接的径线是

下列疾病需与雀斑鉴别，但除外

对看涨期权而言，若市场价格高于协定价格，期权的买方执行期权将有利可图，此时为虚值期权。()

数据的逻辑独立性是指()。

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设某商品的收益函数为R(p)，收益弹性为1+p3，其中p为价格，且R(1)=1,则R(p)=________。

The______has　several　major　components,　including　the　system　kernel,　a　memory　management　system,　the　file　system　manager,　device　

White　box　testing　of　software　testing　is　a　test　for　software　structure.　Which　of　the　following　item　should　not　be　included　in　th

The(71)　program　is　generally　translated　to　an　object　program,　which　is　in　a　form　directly　understandably　by　the　computer。

To　verify　that　your　printer　is　operating　correctly,　you　can　run　the　printer(75)program。

Which　of　the　following　indicate(s)possible　values　for　the　variables　when　the　segment　finishes　execution?(74).　　　　Ⅰ.　x=1,y=2　　　　

The(72)is　a　collection　of　modules　serving　as　interface　between　hardware　and　software　to　provide　a　software　platform．

Very　brief,　simple　expressions　in　program　are　easy　to　write　correctly　and　effortless　to(4).