题目内容

Securing your (1) is not a trivial task. There are many (2) to consider and many (3) to follow.Here then is the list of tasks you need to do to (4) your home computer. Their order is based on howintruders (5)computers,beginning with the most-often used attack methods.By starting withthelower numberedtasks, you address the biggest problemsyou face in securing your computer.Task 1 -UseStrong (6).Task2 -KeepYourSystem (7).Task 3 - Install andUseAnti-Virus (8).Task4 - Make (9)ofImportantFiles andFoldersTask5 -(10)YourFiles.Task6 -Install andUse aFirewall.

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已知一个类public class A{static int i;}运行下列代码后的结果是:A a1= new A();A a2= new A();a1.i=18;a2.i=10;System.out.println(a1.i);System.out.println(a2.i);

A. 1810
B. 1018
C. 1818
D. 1010

以下哪项不是public static void a(){}的重载方法?

A. public static void a(int i){}
B. public static int a(){}
C. public static void a(int i,String name){}
D. public static void a(String name){}

以下关于构造方法的描述,哪一项是正确的

A. 如果程序中没有任何构造方法,编译器会默认增加一个无参数的构造方法
B. 如果程序中没有任何构造方法,编译器会默认增加一个有参数的构造方法
C. 如果程序中存在构造方法,编译器会默认增加一个有参数的构造方法
D. 如果程序中存在构造方法,编译器会默认增加一个无参数的构造方法

已知一个类public class A{int num =10;public void print(){int num=20;System.out.println(this.num);}}运行代码下列代码后的结果是()A a= new A();a.print();

A. 10
B. 20
C. 30
D. 编译错误

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