11. How an object can become serializable?

1. 1. No object is serializable

   
   
   

   2. Any object is serializable

   
   
   

   3. If a class implements java.io.Serializable class
      b)

   
   
   

   4. If a class or any superclass implements java.io.Serializable interface

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   A Java object is serializable if class or any its superclass implements java.io.Serializable or its subinterface java.io.Externalizable.

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12. What is serialization?

1. 1. Turning stream of bytes into an object in memory

   
   
   

   2. Turning object in memory into stream of bits

   
   
   

   3. Turning stream of bits into an object in memory

   
   
   

   4. Turning object in memory into stream of bytes

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   Serialization in Java is the process of turning object in memory into stream of bytes.

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13. What is deserialization?

1. 1. Turning object in memory into stream of bits

   
   
   

   2. Turning stream of bits into an object in memory

   
   
   

   3. Turning stream of bytes into an object in memory

   
   
   

   4. Turning object in memory into stream of bytes

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   Deserialization is the reverse process of serialization which is turning stream of bytes into an object in memory.

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14. What will be printed to the output and written to the file, in the below program?
    

    import java.io.*;  
    public class FileOutputStreamExample
    {  
        public static void main(String args[])
        {    
               try
               {    
                 FileOutputStream FOS = new FileOutputStream("D:\\InterviewMania.txt");    
                 String str="Welcome to the Interview Mania.";    
                 byte q[]=str.getBytes();//converting string into byte array    
                 FOS.write(q);    
                 FOS.close();    
                 System.out.println("Success");    
                }  catch(Exception e){System.out.println(e);}    
          }    
    }
    

1. 1. Only "Welcome to the Interview Mania"

   
   
   

   2. Compile time error

   
   
   

   3. "Success" to the output and "Welcome to the xInterview Mania"

   
   
   

   4. Runtime error

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   First, it will print “Success” and besides that it will write “Welcome to the Interview Mania” to the file InterviewMania.txt.

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15. What type of members are not serialized?

1. 1. Throwable

   
   
   

   2. Static

   
   
   

   3. Protected

   
   
   

   4. Private

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   All static and transient variables are not serialized.

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