已知函数getStudent()定义为public Student getStudent(int ID)，下列四个选项中可以与getStudent构成重载的方法是 A: private Student getStudent(int ID) B: public String getStudent(int ID) C: Student getStudent(String name) D: public Student get(int ID)

一． IO操作问题描述程序功能：在网络传输过程中，对象数据往往需要进行序列化操作，即将对象序列化为byte数组，同时也需要反序列化操作将byte数组转化为对象。下面程序中定义了一个Student类，在该类中已经实现了反序列化操作，请完成序列化的操作代码。程序结构如下：import java.io.*;class Student{int stuNo;//学号String name;//姓名String sex;//性别int age;//年龄String grade;//年级String classname;//班级public Student(int stuNo,String name,String sex,int age,String grade,String classname){this.stuNo=stuNo;this.name=name;this.sex=sex;this.age=age;this.grade=grade;this.classname=classname;}//反序列化操作public static Student GetStudent(byte[] byteStudent){try{ByteArrayInputStream bais=new ByteArrayInputStream(byteStudent);DataInputStream dis=new DataInputStream(bais);int stuNo=dis.readInt();String name=dis.readUTF();String sex=dis.readUTF();int age=dis.readInt();String grade=dis.readUTF();String classname=dis.readUTF():return new Student(stuNo,name,sex,age,grade,classname);}catch(Exception ex){return null;}//序列化操作，请完成public byte[] GetBytes(){... //补充此处代码}public class Exam2{public static void main(String args[]){Student stu=new Student(20090223,”jack”,”man”,21,”三年级”,”2班”);byte[] bytestu=stu.GetBytes();Student stu1=Student.GetStudent(bytestu);System.out.println(stu1.s5uNo);}程序要求1. 实现序列化代码

【单选题】使用命令添加用户student,设置密码为student,然后使用命令删除该用户。 A. useradd student passwd student userdel student B. useradd student passwd student sudo userdel student C. useradd student sudo passwd student sudo userdel student D. su root useradd student passwd student userdel student

‏删除数据表student的命令是________。‏ A: drop table student; B: drop student; C: delete table student; D: drop student;

VBA中打开“student”表的语句是( )。 A: Docmd．OpenForm”student” B: Docmd．OpenQuery"student" C: Docmd．OpenTable"student" D: Docmd．Openreport"student"

【单选题】定义一个学生类Student,则初始化一个学生对象的语句是( A. Student s ； B. Student s = new Student(); C. Student s = new student(); D. Student s = s.student();

声明并创建一个学生类Student的对象s,下列语法格式正确的是: A: Student s = Student(); B: Student s; C: Student s = new Student(); D: Student s = new ();

Given that Student is a class, how many reference variables and objects are created by the following code? Student studentName, studentId; studentName = new Student(); Student stud_class = new Student();

用于删除数据表student正确的语句是： A: drop student B: delete student C: drop database student D: drop table student

Li Ting is a ______. A: first-year student B: second-year student C: third-year student