Given: import java.io.*; class Player { Player() { System.out.print("p"); } } class CardPlayer extends Player implements Serializable { CardPlayer() { System.out.print("c"); } public static void main(String[] args){ CardPlayer cl = new CardPlayer(); try { FileOutputStream fos = new FileOutputStream("play.txt"); ObjectOutputStream os = new ObjectOutputStream(fos); os.writeObject(c1); os.close() ; FileInputStream fis = new FileInputStream("play.txt"); ObjectInputStream is = new ObjectInputStream(fis); CardPlayer c2 = (CardPlayer) is.readObject(); is.close(); } catch (Exception x ) { } } } What is the result?

  1. pc

  2. pcc

  3. pcp

  4. pcpc

  5. Compilation fails

  6. An exception is thrown at runtime


Correct Option: C

AI Explanation

To determine the result of the given code, let's go through each step:

  1. The CardPlayer class extends the Player class and implements the Serializable interface.
  2. In the main method, a new CardPlayer object c1 is created, which invokes the default constructor of CardPlayer.
  3. The code then tries to write the c1 object to a file named "play.txt". This is done using FileOutputStream and ObjectOutputStream.
  4. After writing the object to the file, the code tries to read the object from the file. This is done using FileInputStream and ObjectInputStream.
  5. The object read from the file is assigned to a new CardPlayer object c2.
  6. Finally, the code closes the input and output streams.

Now let's analyze the output:

  • The Player class has a default constructor that prints "p" when called.
  • The CardPlayer class has a default constructor that prints "c" when called.

Based on the code execution:

  1. When the CardPlayer object c1 is created, the output is "c".
  2. When the c1 object is written to the file, the output is not printed.
  3. When the c1 object is read from the file and assigned to c2, the output is "p".
  4. Since the output statement is within the Player class constructor, it is not executed during object serialization and deserialization.

Therefore, the correct answer is option C: "pcp".

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