34、下列代码段中声明了3个类: class Person {}; class Student: public Person{}; class Undergraduate: Student{}; 下列关于这些类之间关系的描述中,错误的是()。A.类 Person是类Undergraduate的基类B.类 Undergraduate从类Student公有继承C.类 Student是类Person的派生类D.类 Undergraduate是类Person的派生类
34、下列代码段中声明了3个类: class Person {}; class Student: public Person{}; class Undergraduate: Student{}; 下列关于这些类之间关系的描述中,错误的是()。
A.类 Person是类Undergraduate的基类
B.类 Undergraduate从类Student公有继承
C.类 Student是类Person的派生类
D.类 Undergraduate是类Person的派生类
参考答案和解析
类 Undergraduate从类Student公有继承
相关考题:
( 30 )下列代码声明了 3 个类class Person{};class Student:public Person{};class Undergraduate:Student{};下列关于这些类之间关系的描述中,错误的是A )类 Person 是类 Undergraduate 的基类B )类 Undergraduate 从类 Student 公有继承C )类 Student 是类 Person 的派生类D )类 Undergraduate 是类 Person 的派生类
阅读下列代码段 abstract class Person{ public Person(String n){ name=n; } public______String getDescription(); public String getName(){ } private String name; } 在下画线处应填入的修饰符是A.staticB.abstractC.protectedD.final
设有下列两个类的定义,则类Person和类Man的关系是( )。 class Person { long id; //身份证号 String name; //姓名 } class Man extends Person { int age; //年龄 int getAge() { return age; } }A.包含关系B.继承关系C.关联关系D.无关系,上述类定义有语法错误
下列代码段声明了3个类:class Person();class Student:public Person{};class Undergraduate:Student{};下列关于这些类之间关系的描述中,错误的是( )。A.类Person是类Undergraduate的基类B.类Undergraduate从类Student公有继承C.类Student是类Person的派生类D.类Undergraduate是类Person的派生类
下列代码段中声明了3个类: Class Person{}; Class Student:publiC Person{}; Class Undergraduate:Student{}; 下列关于这些类之间关系的描述中,错误的是( )。A.类Person是类Undergraduate的基类B.类Undergraduate从类Student公有继承C.类Student是类Person的派生类D.类Undergraduate是类Person的派生类
下列程序运行后的输出结果是( )。#include#includeusing namespace std;class Person{public:Person(string n):name(n) { coutprivate:int year,month,day;};class Student:public Person{public:Student(string n,int y,int m,int d,char c):birthday(y,m,d),sex(c),Person(n) { coutA. SB.PSC.DPSD.PDS
创建一个名为student的新类,保存新类的类库名称是mylib,新类的父类是Person,正确的命令是A.CREATE CLASS mylib OF student As PemonB.CREATE CLASS student OF Pe~on As mylibC.CREATE CLASS student 0F mylib As Pe~onD.CREATE CLASS Person OF mylib As student
下列哪个选项的java源文件代码片段是不正确的?A.package testpackage; public class Test{ }B.import java. io. *; package testpaekage; public class Test { }C.import java.io.*; class Person { } public class Test { }D.import java.io.*; import java. awt.*; public class Test{ }
给出下列的不完整的类代码,则下列的( )语句可以加到横线处。 class Person{ String name,department; int age public Person(String n){name=n;} public Person(String n,int a){name=n;age=a;} pubilc Person(String n,String d,int a) { _______________ department=d; } }A.Person(n,a);B.this(Person(n,a));C.this(n,a);D.this(name,age);
设有下面两个类的定义: class Person{ long id // 身份证号 String name; //姓名 } class Student extends Person{ int score: //成绩 int getScore ( ) { return score; } } 则类Person和类Student的关系是( )。A.包含关系B.继承关系C.关联关系D.无关系
创建一个名为student的新类,保存新类的类库名称是mylib,新类的父类名是Person,正确的命令是( )。A.CREATE CLASS mylib OF student AS PcrsonB.CREATE CLASS student OF Person AS mylibC.CREATE CLASS student OF mylib AS PersonD.CREATE CLASS Person OF mylib AS student
下列代码段声明了3个类:classPerson{);classStudent:publicPerson{};classUndergraduate:Student{);下列关于这些类之间关系的描述中,错误的是( )。A.类Person是类Undergraduate的基类B.类Undergraduate从类Student公有继承C.类Student是类Person的派生类D.类Undergraduate是类Person的派生类
给出下列的不完整的类代码,则下列的哪个语句可以加到横线处? class Person { String name,department; int age; public Person( String n ){ name = n;} public Person( String n,int a ) { name = n;age = a;} public Person( String n,String d,int a ) { _____________ department = d; } }A.Person(n,a);B.this(Person(n,a) );C.this(n,a);D.this(name,age);
设有下面两个类的定义。 class Person { long id; // 身份证号 String name; // 姓名 } class Student extends Person { int score; // 入学总分 } intgetScore() { return score;} } 则类Person和类Student的关系是? } A.包含关系B.继承关系C.关联关系D.上述类定义有语法错误
( 33 ) 创建一个名为 student 的新类 , 保存新类的类库名称是 mylib, 新类的 父 类是 P erson, 正确的命令是A ) CREATE CLASS mylib OF student A s P ersonB ) CREATE CLASS student OF P erson A s mylibC ) CREATE CLASS student OF mylib A s P ersonD ) CREATE CLASS P erson OF mylib A s student
类Student代码如下: class Student{ String name; int age; Student(String nm){ name = nm; } } 执行语句Student stu = new Student()后,字段age的值是哪项?() A、 0B、 nullC、 falseD、 编译错误
Which three demonstrate an “is a” relationship?() A、 public class X { } public class Y extends X { }B、 public interface Shape { } public interface Rectangle extends Shape{ }C、 public interface Color { } public class Shape { private Color color; }D、 public interface Species { } public class Animal { private Species species; }E、 public class Person { } public class Employee { public Employee(Person person) { }F、 interface Component { } class Container implements Component { private Component[] children; }
在C#中,假设Person是一个类,而ITeller是一个接口,下面的()类声明是正确的。A、class Employee:Person,ITeller B、class Employee:ITeller,PersonC、class Employee-Person,ITellerD、class Employee:Person / ITeller
下列有关类声明的代码片段,哪一项是正确的?() A、 import java.sql.*; package school; class Student{ }B、 package school; import java.sql.*; class Student{ }C、 package school; class Student{ } import java.sql.*;D、 package school; import java.sql.*;private String name; class Student{ }
对于如下代码,描述正确的是哪项?() class Student{ public static void main(String[] args){ Student student=new Student(); } } A、new Student()创建了Student对象的一个实例B、Student student声明了对象Student的一个引用C、class Student声明了一个类D、new Student()创建了一个类E、Student student 声明了一个类
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; )
对于如下代码,描述正确的是哪项? () class Student{ public static void main(String[] args){ Student student = new Student(); } } A、Student student 声明了一个类B、new Student()创建了Student 对象的一个实例C、Student student 声明了对象Student 的一个引用D、class Student 声明了一个类
多选题对于如下代码,描述正确的是哪项? () class Student{ public static void main(String[] args){ Student student = new Student(); } }AStudent student 声明了一个类Bnew Student()创建了Student 对象的一个实例CStudent student 声明了对象Student 的一个引用Dclass Student 声明了一个类
单选题创建一个名为student的新类,保存新类的类库名称是mylib,新类的父类是Person,正确的命令是( )。ACREATE CLASS mylib OF student As PersonBCREATE CLASS student OF Person As mylibCCREATE CLASS student OF mylib As PersonDCREATE CLASS Person OF mylib As student
多选题Which three demonstrate an “is a” relationship?()Apublic class X { } public class Y extends X { }Bpublic interface Shape { } public interface Rectangle extends Shape{ }Cpublic interface Color { } public class Shape { private Color color; }Dpublic interface Species { } public class Animal { private Species species; }Epublic class Person { } public class Employee { public Employee(Person person) { }Finterface Component { } class Container implements Component { private Component[] children; }
单选题下列有关类声明的代码片段,哪一项是正确的?()A import java.sql.*; package school; class Student{ }B package school; import java.sql.*; class Student{ }C package school; class Student{ } import java.sql.*;D package school; import java.sql.*;private String name; class Student{ }
单选题You are developing a Windows Communication Foundation (WCF) service that contains the following service contract.[ServiceContract( )]public interface IPaymentService{ [OperationContract( )] void RecordPayments(Person person);}public class Person{ ... }public class Employee : Person{ ... }public class Customer : Person{ ... }You need to ensure that RecordPayments can correctly deserialize into an Employee or a Customer object. What should you do?()AAdd the following KnownType attribute to the Employee class and to the Customer class. [KnownType(GetType(Person))]BImplement the IExtensibleDataObject interface in the Person class.CImplement the IExtension(ofType(T)) interface in the Person class.DAdd the following KnownType attributes to the Person class. [KnownType(GetType(Employee))] [KnownType(GetType(Customer))]
多选题对于如下代码,描述正确的是哪项?() class Student{ public static void main(String[] args){ Student student=new Student(); } }Anew Student()创建了Student对象的一个实例BStudent student声明了对象Student的一个引用Cclass Student声明了一个类Dnew Student()创建了一个类EStudent student 声明了一个类