A system is experiencing name resolution issues. The administrator has verified that /etc/resolv.conf is suitably configured using correct syntax. However， processes run by non-root users are failing to resolve any hostnames to IP addresses with the erro

题目

A system is experiencing name resolution issues. The administrator has verified that /etc/resolv.conf is suitably configured using correct syntax. However， processes run by non-root users are failing to resolve any hostnames to IP addresses with the error ’No response from server’. Which tool will help trace the nslookup command in an attempt to investigate the problem？（）

A、kdb
B、dbx
C、trace
D、truss

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第1题

请完成下列Java程序：首先建立一个类，包含2个私有成员变量，分别为int和double型，并提供公共方法setInt()和 setDouble()分别给这两个变量赋值和用toString()方法显示对象的私有成员变量的值，要求将这个类定义为Serializable，再创建这个类的持久对象，将对象写入名为ex3_2．data的文件中并显示对象的2个成员变量，最后从这个文件中读取这个对象并显示对象的2个成员变量。注意：请勿改动main()主方法和其他已有语句内容，仅在下划线处填入适当的语句。程序运行结果如下：ex3_2: i=123 d=123.456ex3_2: i=123 d=123.456import java.io.*;public class ex3_2 implements Serializable {private int n3_2;private double d3_2;ex3_2() {n3_2 = 25;d3_2 = 12.23;}public void setDouble(double x) {d3_2 = x;}public void setInt(int x) {n3_2 = x;}public String toString() {return("ex3_2: i=" + n3_2 + "d=" + d3_2);}public static void main(String[] arg) {ex3_2 e1 = new ex3_2 );ex3_2 e2;e1.setInt(123);e1.setDouble(123.456);System.out.println(e1);try {FileOutputStream fos3_2 = new FileOutputStream("ex3_2.data");ObjectOutputStream oos3_2 = new ObjectOutputStream(fos3_2);________________;} catch(IOException ioe) {System.out.println(ioe);}try {FileInputStream fis3_2 = new FileInputStream("ex3_2.data");ObjectInputStream ois3_2 = new ObjectInputStream(fis3_2);________________;System.out.println(e2)；}catch(10Exception ioe) {System.out.println(ioe)；}catch(ClassNotFoundException cnfe) {System.out.println(cnfe)；}}}

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第2题

指出下列程序运行的结果 ( ) public class Example{ String str=new String("good")； char[]ch={'a','b','c'}； public static void main(String args[]){ Example ex=new Example()； ex.change(ex.otr，ex.ch)； System.out.print(ex.str+"and")； System.out.print(ex.ch)； } public void change(String str，char ch[])} str="test ok"； ch[0]≈'g'； } }A．good and abcB．good and gbcC．test ok and abcD．test ok and gbc

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第3题

下列程序使用系统标准输入System.in从键盘获得输入字符串，请选择正确的一项填入下列程序的横线处。 import java.io.*; public class ex26 { public static void main(String args[]) { byte buffer[] = new byte[128]; int n; try { n = for(int i = 0; i ＜ n; i++) System.out .print ( (char)buffer [i] ); catch (IOException e) { System.out.print (e); } } }A．System.in.read(buffer)B．system.in.read(buffer)C．System.in.read0D．System.in(buffer)

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第4题

下列程序运行的结果为：public class Example{String str=new String("good");char[] ch={'a','b','c'};public static void main(String args[]){Example ex=new Example();ex.change(ex.str,ex.ch);System.out.print(ex.str+" and ");Sytem.out.print(ex.ch);}public void change(String str,char ch[]){str="test ok";ch[0]='g';}}A. good and abcB. good and gbcC. test ok and abcD. test ok and gbc

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第5题

static void test（） throws RuntimeException { try { System.out.print（”test “）； throw new RuntimeException（）； } catch （Exception ex） { System.out.print（”exception “）； } } public static void main（String[] args） { try { test（）； } catch （RuntimeException ex） { System.out.print（”runtime “）； } System.out.print（”end “）； } What is the result？（） A、 test endB、 Compilation fails.C、 test runtime endD、 test exception endE、 A Throwable is thrown by main at runtime.

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第6题

Which IBM System x server models include the eX4 Architecture？（）A、x3850 M2B、x3950C、x3850D、x3755

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第7题

public class X { public static void main（String [] args） { try { badMethod（）； System.out.print（“A”）； } catch （Exception ex） { System.out.print（“C”）； } finally { System.out.print（“B”）； } System.out.print（“D”）； } public static void badMethod（） { throw new Error（）； } } What is the result？（） A、 ABCDB、 Compilation fails.C、 C is printed before exiting with an error message.D、 BC is printed before exiting with an error message.E、 BCD is printed before exiting with an error message.

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A system is experiencing name resolution issues. The administrator has verified that /etc/resolv.conf is suitably configured using correct syntax. However， processes run by non-root users are failing to resolve any hostnames to IP addresses with the erro

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