class A { A（） { } } class B extends A { } Which two statements are true？（）A、 Class B’s constructor is public.B、 Class B’s constructor has no arguments.C、 Class B’s constructor includes a call to this（）.D、 Class B’s constructor includes a call to super（）.
class A { A（） { } } class B extends A { } Which two statements are true？（）
- A、 Class B’s constructor is public.
- B、 Class B’s constructor has no arguments.
- C、 Class B’s constructor includes a call to this（）.
- D、 Class B’s constructor includes a call to super（）.
相关考题：
Given:Which two, inserted at line 11, will allow the code to compile?() A.public class MinMax? {B.public class MinMax? extends Number {C.public class MinMaxN extends Object {D.public class MinMaxN extends Number {E.public class MinMax? extends Object {F.public class MinMaxN extends Integer {
Anairlineisbuildingabookingsystemforitspremiumandgeneralcustomers.Thegoalistoensurepremiummembersaregivenhigheraccessprioritywhenusertrafficishigh.Whatconfigurationwillachievethisgoal?() A.ConfigureaWorkManagerforpremiumuserswithaMinimumThreadConstraint.B.ConfigureaWorkManagerforpremiumuserswithahigherfair-share-request-class.C.ConfigureaWorkManagerforpremiumuserswithahigherresponse-time-request-class.D.ConfigureaWorkManagergeneraluserswithaMaximumThreadConstraint.E.ConfigureaWorkManagerforpremiumuserswithacustomrequest-class.
下面程序输出的结果为 #include"iostream．h" class A { public： A(){cout＜＜"CLASSA"＜＜endl；} ～A() {} }; class B：public A { public： B(){cout＜＜"CLASSB"＜＜endl；} ～B() {} }； void main() { A * p； p=new B； B *q； q=new B； }A．CLASS A CLASS BB．CLASS A CLASS B CLASS BC．CLASS A CLASS B CLASS A CLASS BD．CLASS A CLASS B CLASS B CLASS B
下面程序输出的结果为#include"iostream.h"class A{public：A( ){cout＜＜"CLASS A"＜＜endl；}～A( ){}}；class B：public A{public：B( ){cout＜＜"CLASS B"＜＜endl；}～B( ){}}；void main( ){A*p；p=new B；B *q；q=new B；}A．CLASS A CLASS BB．CLASS A CLASS B CLASS BC．CLASS A CLASS B CLASS A CLASS BD．CLASS A CLASS B CLASS B CLASS B
下面程序输出的结果为 #include"iostream.h” class A ｛ public: A()｛cout＜＜"CLASSA"＜＜endl;｝ ～A() ｛｝ ｝; class B:public A ｛ public: B()｛cout＜＜"CLASS B"＜＜endl;｝ ～B()｛｝ ｝; void main() ｛ A*p; p＝new B;A．CLASS A CLASS B CLASS B CLASS BB．CLASS A CLASS B CLASS A CLASS BC．CLASS A CLASS B CLASS BD．CLASS A CLASS B
下面程序输出的结果为( )。 #inClUde”iostream.h” Class A {public： A(){cout＜＜“CLASS A”＜＜endl；} ～A()＜)}； class B：public A {public： B(){cout＜＜”CLASSB”＜＜endl；} ～B(){}}； void main() {A*p； p＝new B； B *q； q＝new B；}A．CLASS A CLASS BB．CLASS A CLASS B CLASS BC．CLASS A ClASS BD．CLASS A CLASS B CLASS A CLASS B CLASS B CLASS B
对于下面( )类定义,可以通过“newJ_Class()”生成类J_Class的实例对象。A、publicclassJ_Class{publicJ_Class(void){}}B、publicclassJ_Class{}C、publicclassJ_Class{publicJ_Class(Strings){}}D、publicclassJ_Class{publicvoidJ_Class(){}publicJ_Class(Strings){}
WhichclassofCiscoaccesspointsoperateunderIEEE802.3afpower?() A.ClassAB.Class1C.Class2D.Class3E.Class4
Which class of Cisco access points operate under IEEE 802.3af power？（）A、Class AB、Class 1C、Class 2D、Class 3E、Class 4
In which two cases does the compiler supply a default constructor for class A？（） A、 class A{}B、 class A { public A（）{} }C、 class A { public A（int x）{} }D、 class Z {} class A extends Z { void A（）{} }
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.
package foo； public class Outer { public static class Inner { } } Which statement is true？（） A、 Compilation fails.B、 An instance of the Inner class can be constructed with “new Outer.Inner（）”.C、 An instance of the Inner class cannot be constructed outside of package foo.D、 An instance of the Inner class can be constructed only from within the Outer class.E、 From within the package foo， and instance of the Inner class can be constructed with “new Inner（）”.
Which declaration prevents creating a subclass of an outer class？（）A、 Static class FooBar{}B、 Private class FooBar{}C、 Abstract public class FooBar{}D、 Final public class FooBar{}E、 Final abstract class FooBar{}
Which two allow the class Thing to be instantiated using new Thing（）？A、 public class Thing { }B、 public class Thing { public Thing（） {} }C、 public class Thing { public Thing（void） {} }D、 public class Thing { public Thing（String s） {} }E、 public class Thing { public void Thing（） {} public Thing（String s） {} }
Which of the following class addresses is reserved for multicast？（）A、 Class AB、 Class BC、 Class CD、 Class D
Which of the following class networks contains 65，534 hosts？（）A、Class AB、Class BC、Class CD、Class D
Which two are benefits of fully encapsulating a class？（） A、 Performance of class methods is improved.B、 Implementation details of the class are hidden.C、 Access modifiers can be omitted on class data members.D、 Code that uses the encapsulation class can access data members directly.E、 Internal operation of the class can be modified without impacting clients of that class.
Which Man class properly represents the relationship "Man has a best friend who is a Dog"？（）A、class Man extends Dog{}B、class Man implements Dog{}C、class Man{private BestFriend dog；}D、class Man{private Dog bestFriend；}E、class Man{private Dog；}F、class Man{private BestFriend；}
Which methods from the String and StringBuffer classes modify the object on which they are called？（） A、The charAt（） method of the String class.B、The toUpperCase（） method of the String class.C、The replace（） method of the String class.D、The reverse（） method of the StringBuffer class.E、The length（） method of the StringBuffer class.
Which statements about static inner classes are true？（）A、 A static inner class requires a static initializer.B、 A static inner class requires an instance of the enclosing class.C、 A static inner class has no reference to an instance of the enclosing class.D、 A static inner class has access to the non-static members of the outer class.E、 Static members of a static inner class can be referenced using the class name of the static inner class.
Which two demonstrate an “is a” relationship？（） A、 public interface Person { } public class Employee extends Person { }B、 public interface Shape { } public class Employee extends Shape { }C、 public interface Color { } public class Employee extends Color { }D、 public class Species { } public class Animal （private Species species；）E、 interface Component { } Class Container implements Component （ Private Component[ ]children； ）
What produces a compiler error？（） A、 class A { public A（int x） {} }B、 class A {} class B extends A { B（） {} }C、 class A { A（） {} } class B { public B（） {} }D、 class Z { public Z（int） {} } class A extends Z {}
单选题Which declaration prevents creating a subclass of an outer class？（）A Static class FooBar{}B Private class FooBar{}C Abstract public class FooBar{}D Final public class FooBar{}E Final abstract class FooBar{}
单选题For which of the listed classes of fire combinations would carbon dioxide be most suitable as the extinguishing agent （）.AClass A and class BBClass B and class CCClass A and class CDClass C, class D, and class E
单选题Which Man class properly represents the relationship “Man has a best friend who is a Dog”？（）A class Man extends Dog { }B class Man implements Dog { }C class Man { private BestFriend dog； }D class Man { private Dog bestFriend； }E class Man { private Dog }F class Man { private BestFriend }
单选题What produces a compiler error？（）A class A { public A（int x） {} }B class A {} class B extends A { B（） {} }C class A { A（） {} } class B { public B（） {} }D class Z { public Z（int） {} } class A extends Z {}