Which of these is method of ObjectOutput interface used to finalize the output state?

Asked by JudgeAtom2757

Code in Java below question and MCQs also in Java

Given a number A, return number of ways you can draw A chords in a circle with 2 x A points such that no 2 chords intersect.

Two ways are different if there exists a chord which is present in one way and not in other.

Return the answer modulo 10^9 + 7.

Input Format:

The first and the only argument contains the integer A.

Output Format:

Return an integer answering the query as described in the problem statement.

Constraints:

1 <= A <= 1000

Examples:

Input 1:

  A = 1

Output 1:

  1

1. Which of these is a process of writing the state of an object to a byte stream?

a) Serialization

b) Externalization

c) File Filtering

d) All of the mentioned

2. Which of these process occur automatically by the java runtime system?

a) Serialization

b) Garbage collection

c) File Filtering

d) All of the mentioned

3. Which of these is an interface for control over serialization and deserialization?

a) Serializable

b) Externalization

c) FileFilter

d) ObjectInput

4. Which of these interface extends DataOutput interface?

a) Serializable

b) Externalization

c) ObjectOutput

d) ObjectInput

5. Which of these is a method of ObjectOutput interface used to finalize the output state so that any buffers are cleared?

a) clear()

b) flush()

c) fflush()

d) close()

6. Which of these is method of ObjectOutput interface used to write the object to input or output stream as required?

a) write()

b) Write()

c) StreamWrite()

d) writeObject()

7. What will be the output of the following Java program?

  import java.io.*;

  class serialization 

  {

    public static void main(String[] args) 

    {

      try 

      {

        Myclass object1 = new Myclass("Hello", -7, 2.1e10);

     FileOutputStream fos = new FileOutputStream("serial");

     ObjectOutputStream oos = new ObjectOutputStream(fos);

        oos.writeObject(object1);

        oos.flush();

        oos.close();

   }

   catch(Exception e) 

      {

     System.out.println("Serialization" + e);

        System.exit(0);

      }

   try  

      {

        Myclass object2;

     FileInputStream fis = new FileInputStream("serial");

     ObjectInputStream ois = new ObjectInputStream(fis);

        object2 = (Myclass)ois.readObject();

        ois.close();

     System.out.println(object2);    

   }

   catch (Exception e) 

      {

        System.out.print("deserialization" + e);

     System.exit(0);

   }

    }

  }

  class Myclass implements Serializable 

  {

 String s;

 int I;

 double d;

    Myclass (String s, int i, double d)

    {

   this.d = d;

   this.i = I;

   this.s = s;

 }

  }

a) s=Hello; i=-7; d=2.1E10

b) Hello; -7; 2.1E10

c) s; i; 2.1E10

d) Serialization

8. What will be the output of the following Java program?

  import java.io.*;

  class serialization 

  {

    public static void main(String[] args) 

    {

      try 

      {

        Myclass object1 = new Myclass("Hello", -7, 2.1e10);

     FileOutputStream fos = new FileOutputStream("serial");

     ObjectOutputStream oos = new ObjectOutputStream(fos);

        oos.writeObject(object1);

        oos.flush();

        oos.close();

   }

   catch(Exception e) 

      {

     System.out.println("Serialization" + e);

        System.exit(0);

      }

   try

      {

     int x;

     FileInputStream fis = new FileInputStream("serial");

     ObjectInputStream ois = new ObjectInputStream(fis);

        x = ois.readInt();

        ois.close();

     System.out.println(x);    

   }

   catch (Exception e)

      {

        System.out.print("deserialization");

     System.exit(0);

   }

    }

  }

  class Myclass implements Serializable

  {

 String s;

 int I;

 double d;

    Myclass(String s, int i, double d)

    {

   this.d = d;

   this.i = I;

   this.s = s;

 }

  }

a) -7

b) Hello

c) 2.1E10

d) deserialization

9. What will be the output of the following Java program?

  import java.io.*;

  class Chararrayinput

  {

    public static void main(String[] args) 

    {

   String obj = "abcdefgh";

      int length = obj.length();

      char c[] = new char[length];

      obj.getChars(0, length, c, 0);

      CharArrayReader input1 = new CharArrayReader(c);

      CharArrayReader input2 = new CharArrayReader(c, 1, 4);

      int I;

      int j;

      try 

      {

 while ((i = input1.read()) == (j = input2.read()))

        {

          System.out.print((char)i);

        }

      } 

      catch (IOException e) 

      {

        e.printStackTrace();

   }

 }

  }

a) abc

b) abcd

c) abcde

d) None of the mentioned

10. What will be the output of the following Java program?

  import java.io.*;

  class streams

  {

    public static void main(String[] args) 

    {

      try

      {

     FileOutputStream fos = new FileOutputStream("serial");

     ObjectOutputStream oos = new ObjectOutputStream(fos);

        oos.writeFloat(3.5);

        oos.flush();

        oos.close();

   }

   catch(Exception e)

      {

     System.out.println("Serialization" + e);

        System.exit(0);

      }

   try 

      {

     float x;

     FileInputStream fis = new FileInputStream("serial");

     ObjectInputStream ois = new ObjectInputStream(fis);

        x = ois.readInt();

        ois.close();

     System.out.println(x);    

   }

   catch (Exception e)

      {

        System.out.print("deserialization");

     System.exit(0);

   }

    }

  }

a) 3

b) 3.5

c) serialization

d) deserialization