Java I/O Test – 2

1. Which of these data type is returned by every method of OutputStream?

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

 
    import java.io.*;
    public class filesinputoutput 
    {
    	public static void main(String[] args) 
        {
 	   String obj  = "abc";
           byte b[] = obj.getBytes();
           ByteArrayInputStream obj1 = new ByteArrayInputStream(b);
           for (int i = 0; i < 2; ++ i) 
           {
               int c;
               while ((c = obj1.read()) != -1) 
               {
            	   if (i == 0) 
                   {
                       System.out.print(Character.toUpperCase((char)c)); 
            	   }
               }
           }
        }
    }

3. Which of these method of InputStream is used to read integer representation of next available byte input?

4. Which of these class is used to read and write bytes in a file?

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

 
    import java.io.*;
    public class filesinputoutput 
    {
    	public static void main(String[] args) 
        {
 	   String obj  = "abc";
           byte b[] = obj.getBytes();
           ByteArrayInputStream obj1 = new ByteArrayInputStream(b);
           for (int i = 0; i < 2; ++ i) 
           {
               int c;
               while ((c = obj1.read()) != -1) 
               {
            	   if(i == 0) 
                   {
            	       System.out.print((char)c); 
            	   }
               }
           }
        }
    }

6. Which of these classes is used for input and output operation when working with bytes?

7. Which of these is a method to clear all the data present in output buffers?

8. What will be the output of the following Java program? (Note: inputoutput.java is stored in the disk.)

 
    import java.io.*;
    class filesinputoutput 
    {
        public static void main(String args[]) 
        {
            InputStream obj = new FileInputStream("inputoutput.java");
            System.out.print(obj.available());
        }
    }

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

 
    import java.io.*;
    public class filesinputoutput 
    {
    	public static void main(String[] args) 
        {
 	   String obj  = "abc";
           byte b[] = obj.getBytes();
           ByteArrayInputStream obj1 = new ByteArrayInputStream(b);
           for (int i = 0; i < 2; ++ i) 
           {
               int c;
               while ((c = obj1.read()) != -1) 
               {
            	   if (i == 0) 
                   {
                       System.out.print(Character.toUpperCase((char)c));
                       obj2.write(1); 
            	   }
               }
               System.out.print(obj2);
           }
        }
    }

10. Which of these method(s) is/are used for writing bytes to an outputstream?