开发能力测试题-JAVA.docx

《开发能力测试题》?员工编号：______________????姓名：__????????______??成绩：____________?一、??????????基础1.???????分析下列Java代码：class? A{public?static void main(String[]?args){method();}static?void method(){try{System.out.println(“Hello”);System.exit(0);}finally{System.out.println(“good-bye”);}}}编译运行后，输出的结果是：（??）a)“Hello”????????????????????b)“good-bye”c)“Hello”后面是”good-bye”??d)??代码不能通过编译?2.???选择正确的选项，foo结果是什么？（??）int?index = 1;String[] test =?new?String[3];String foo =?test[index];???A、foo有一个值“”??????B、foo有一个值nullC、抛出一个异常?????????D、代码不会编译3.???以下代码执行结果是（??）public?class A{?? String s=”123”;?? Public void?method(String s){????????System.out.println(s);????????System.out.println(this.s);}public?static void main(String[]?args){????A? a?= new A();a.method(“abc”);}}A、??abc?? 123??????????????B、??123???abcC、??abc???abc??????????????D、??123?? 123?4.???选择正确的选项（??）public?? class??ConstOver{???????public??ConstOver(int??x,int??y,int? z){}}说出哪个重载了ConstOver构造器？A、ConstOver(){}B、protected??int??ConstOver(){}C、private??ConstOver(String??z,String??y,byte? z){}D、public? void??ConstOver(byte??x,byte??y,byte? z){}E、public? Object??ConstOver(int??x,int??y,int? z){}?5.???当试图编译并运行下面程序时会出现什么结果？ （??）public?class?MyMain{public static void main(String?argv){???????System.out.println(Hello cruel world);}}A??编译器报main属于保留字而不能在一个class中使用B??代码将编译、运行并输出“Hello cruel world”C ?代码编译通过，但运行时报没有定义构造方法D ?代码编译通过，但运行时报main方法没有正确定义?6.???当编译并运行下面程序时会出现什么结果？（??）public class?MyAr{???? public static void main(String?argv[]){??????????int[]?i?= new?int[5];??????????System.out.println(i[5]);???? }}A?编译出错B?运行出错C?输出0D?输出“null”?7.???请选择正确说法（??）public class Hope{????? public static void main(String?argv[]){????????? Hope h = new Hope();????? }????? protected Hope(){????????? for(int?i?=0;?i?10;?i?++){???????????????System.out.println(i);????????? }????? }}A)?编译错误，构造方法不能被声明为protectedB)?运行错误，构造方法不能被声明为protectedC)?编译并运行输出0到10D)?编译并运行输出0到9?8.???选择正确的选项public?class?MyField{????int?i??= 99;????public?static void main(String[]?args){????????MyField?