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
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
相关考题：
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.
现有包结构:com|－－x||－－Alpha.class||||－－y||－－Beta.class||－－Gamma.class和类:／／insertcodehereimportcom.*;importcom.x.y.*;classTest{Alphaa;Betab;Gammac;}哪两行分别插入后可允许代码编译?() A.packagecom.；B.importcom.x；C.packagecom.x；D.importcom.x.Alpha；
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;
现有如F包结构： com |一一X | |一一Alpha.class | | | |一一y I |一一Beta.class | |l-- Gamma.class 和类： class Test { Alpha a； Beta b； Gamma c； } 哪三个必须加入到类Test中，以使其通过编译？（） A、 package y；B、 package com；C、 import com.x.y.*；D、 import com.x.*；
现有包结构： com |-- x | |-- Alpha.class | | | |-- y | |-- Beta.class | |-- Gamma.class 和类： //insert code here import com.*； import com.x.y.*； class Test { Alpha a； Beta b； Gamma c； } 哪两行分别插入后可允许代码编译？（） A、package com.；B、import com.x；C、package com.x；D、import com.x.Alpha；
现有如下包结构： com |-- x | |-- Alpha.class | | | |-- y | |-- Beta.class | |-- Gamma.class 和类： class Test { Alpha a； Beta b； Gamma c； } 哪三个必须加入到类 Test 中，以使其通过编译？（）A、package y；B、package com；C、import com.x.*；D、import com.x.y.*
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？（）A、It moves to BetaB、It stays on GammaC、It moves to AlphaD、It moves to Alpha， then to Beta
10. interface Foo {} 11. class Alpha implements Foo {} 12. class Beta extends Alpha {} 13. class Delta extends Beta { 14. public static void main（ String[] args） { 15. Beta x = new Beta（）； 16. // insert code here 17. } 18. } 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；
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
单选题10. interface Foo {} 11. class Alpha implements Foo {} 12. class Beta extends Alpha {} 13. class Delta extends Beta { 14. public static void main（ String[] args） { 15. Beta x = new Beta（）； 16. // insert code here 17. } 18. } 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；
多选题10. class Foo { 11. static void alpha（） { /* more code here */ } 12. void beta（） { /* more code here */ } 13. } Which two are true？（）AFoo.beta（） is a valid invocation of beta（）.BFoo.alpha（） is a valid invocation of alpha（）.CMethod beta（） can directly call method alpha（）.DMethod alpha（） can directly call method beta（）.
单选题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；
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。