单选题如果ALPHA类继承自BETA类,则ALPHA类称为(),BETA 类称为()。A基类;派生类B密封类;基类C派生类;基类

单选题
如果ALPHA类继承自BETA类,则ALPHA类称为(),BETA 类称为()。
A

基类;派生类

B

密封类;基类

C

派生类;基类


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14 Alpha buys goods from Beta. At 30 June 2005 Beta’s account in Alpha’s records showed $5,700 owing to Beta.Beta submitted a statement to Alpha as at the same date showing a balance due of $5,200.Which of the following could account fully for the difference?A Alpha has sent a cheque to Beta for $500 which has not yet been received by Beta.B The credit side of Beta’s account in Alpha’s records has been undercast by $500.C An invoice for $250 from Beta has been treated in Alpha’s records as if it had been a credit note.D Beta has issued a credit note for $500 to Alpha which Alpha has not yet received.

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简述Alpha测试与beta的区别。

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定义alpha测试和beta测试的区别。

单选题A resource group, MY_APP, has the following configuration: Resource Group NameMY_APP Participating Node Name(s)Alpha Beta GammaStartup Policy Online On Home Node Only Fallover Policy Fallover To Next Priority Node In The List Fallback Policy Fallback To Higher Priority Node InThe List MY_APP is currently running on node Beta. MY_APP is then moved to node Gamma using C-SPOC.Nodes Alpha and Beta are shutdown and restarted. Node Alpha stabilizes approx 60 seconds before nodeBeta. What happens to the resource group, MY_APP, when nodes Alpha and Beta are restarted?()AIt moves to BetaBIt stays on GammaCIt moves to AlphaDIt moves to Alpha, then to Beta

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单选题Given: Which code, inserted at line 16, will cause a java.lang.ClassCastException?()A Alpha a = x;B Foo f = (Delta)x;C Foo f = (Alpha)x;D Beta b = (Beta)(Alpha)x;

填空题如果类A继承了类B,则类A被称为()类,类B被称为()类。