Assuming that the serializeBanana2（） and the deserializeBanana2（） methods will correctly use Java serialization and given： 
import java.io.*； 
class Food {Food（） { System.out.print（”1”）； } } 
class Fruit extends Food implements Serializable { 
Fruit（） { System.out.print（”2”）； } } 
public class Banana2 extends Fruit { int size = 42； 
public static void main（String [] args） { 
Banana2 b = new Banana2（）； 
b.serializeBanana2（b）； // assume correct serialization 
b = b.deserializeBanana2（b）； // assume correct 
System.out.println（” restored “+ b.size + “ “）； } 
// more Banana2 methods 
} 
What is the result？（） 

Assuming that the serializeBanana（） and the deserializeBanana（） methods will correctly use Java serialization and given： 
import java.io.*； 
class Food implemertts Serializable {int good = 3；} 
class Fruit externds Food {int juice = 5；} 
public class Banana extends Fruit { 
int yellow = 4； 
public static void main（String [] args） { 
Banana b = new Banana（）； Banana b2 = new Banana（）； 
b.serializeBanana（b）； // assume correct serialization 
b2 = b.deserializeBanana（）； // assume correct 
System.out.println（”restore “+b2.yellow+ b2.juice+b2.good）； 
} 
// more Banana methods go here 
} 
What is the result？（） 

1. import java.io.*； 
2. public class Foo implements Serializable { 
3. public int x， y； 
4. public Foo（ int x， int y） { this.x = x； this.y = y； } 
5. 
6. private void writeObject（ ObjectOutputStream s） 
7. throws IOException { 
8. s.writeInt（x）； s.writeInt（y） 
9. } 
10. 
11. private void readObject（ ObjectInputStream s） 
12. throws IOException， ClassNotFoundException { 
13. 
14. // insert code here 
15. 
16. } 
17. } 
Which code， inserted at line 14， will allow this class to correctly serialize and deserialize？（） 

import java.io.*； 
public class Forest implements Serializable { 
private Tree tree = new Tree（）； 
public static void main（String [] args） { 
Forest f= new Forest（）； 
try { 
FileOutputStream fs = new FileOutputStream（”Forest.ser”）； 
ObjectOutputStream os = new ObjectOutputStream（fs）； 
os.writeObject（f）； os.close（）； 
} catch （Exception ex） { ex.printStackTrace（）； } 
} 
} 
class Tree { } 
What is the result？（） 

10. class MakeFile { 
11. public static void main（String[] args） { 
12. try { 
13. File directory = new File（”d”）； 
14. File file = new File（directory，”f”）； 
15. if（!file.exists（）） { 
16. file.createNewFile（）； 
17. } 
18. } catch （IOException e） { 
19. e.printStackTrace 
20. } 
21. } 
22. } 
The current directory does NOT contain a directory named “d.” Which three are true？（）

public class Wow { 
public static void go（short n） {System.out.println（”short”）； } 
public static void go（Short n） {System.out.println（”SHORT”）；} 
public static void go（Long n） {System.out.println（” LONG”）； } 
public static void main（String [] args） { 
Short y= 6； 
int z=7； 
go（y）； 
go（z）； 
} 
} 
What is the result？（） 

public class Yikes { 
public static void go（Long n） {System.out.println（”Long “）；} 
public static void go（Short n） {System.out.println（”Short “）；} 
public static void go（int n） {System.out.println（”int “）；} 
public static void main（String [] args） { 
short y= 6； 
long z= 7； 
go（y）； 
go（z）； 
} 
} 
What is the result？（） 

public class TestString3 { 
public static void main（String[] args） { 
// insert code here 
System.out.println（s）； 
} 
} 
Which two code fragments， inserted independently at line 3， generate the output 4247？（）

public String makinStrings（） { 
String s = “Fred”； 
s = s + “47”； 
s = s.substring（2， 5）； 
s = s.toUpperCase（）； 
return s.toString（）； 
} 
How many String objects will be created when this method is invoked？（）