Given the following code， which code fragments， when inserted at the indicated location， will succeed in making the program display a button spanning the whole window area？（）  
import java.awt.*； 
 public class Q1e65 {  
public static void main（String args[]） {  
Window win = new Frame（）；  
Button but = new Button（"button"）；  
// insert code fragment here  win.setSize（200， 200）； 
 win.setVisible（true）； 
 }  
}  

What will be written to the standard output when the following program is run？（）  
public class Qcb90 {  
int a；  
int b；  
public void f（） {  a = 0；  
b = 0；  
int[] c = { 0 }；  
g（b， c）；  
System.out.println（a + " " + b + " " + c[0] + " "）； 
 }  
public void g（int b， int[] c） { 
 a = 1；  b = 1；  c[0] = 1；  }  
public static void main（String args[]） { 
 Qcb90 obj = new Qcb90（）；  
obj.f（）； 
 }  
}  

What will be written to the standard output when the following program is run？（）  
public class Q8499 {  
public static void main（String args[]） { 
double d = -2.9；  
int i = （int） d； 
i *= （int） Math.ceil（d）； 
i *= （int） Math.abs（d）；  
System.out.println（i）； 
 } 
 }

Which code fragments will succeed in printing the last argument given on the command line to the standard output， and exit gracefully with no output if no arguments are given？（）  
CODE FRAGMENT a：  
public static void main（String args[]） { 
 if （args.length != 0）  
System.out.println（args[args.length-1]）； 
 }  
CODE FRAGMENT b：  
public static void main（String args[]） {  
try { System.out.println（args[args.length]）； }  
catch （ArrayIndexOutOfBoundsException e） {} 
 }  
CODE FRAGMENT c：  
public static void main（String args[]） {  
int ix = args.length；  
String last = args[ix]；  
if （ix != 0） System.out.println（last）；  
}  
CODE FRAGMENT d：  
public static void main（String args[]） {  
int ix = args.length-1；  
if （ix > 0） System.out.println（args[ix]）； 
 }  
CODE FRAGMENT e：  
public static void main（String args[]） {  
try { System.out.println（args[args.length-1]）； 
}catch （NullPointerException e） {} 
 }  

Which statements concerning the relationships between the following classes are true？（）  
class Foo {  int num；  
Baz comp = new Baz（）；  
}  
class Bar {  boolean flag；  
}  
class Baz extends Foo {  
Bar thing = new Bar（）；  
double limit；  
}