What will be the output of the following Java program if input given is 'abcqfghqbcd'?

class Input_Output
{
    public static void main(String args[]) throws IOException
    {	 
        char c;
        BufferedReader obj = new BufferedReader(new InputStreamReader(System.in));
        do
        {
            c = (char) obj.read();
      System.out.print(c);
        } while(c != 'q');
    }
}

Which class is used to read data from the keyboard in Java?

A. Scanner

B. FileReader

C. BufferedReader

D. InputStream

What is the purpose of the `System.out.println()` method in Java?

A. It performs mathematical operations

B. It writes data to a file

C. It reads data from the keyboard

D. It prints data to the standard output stream followed by a newline

Which method is used to write data to a file in Java?

A. read()

B. print()

C. write()

D. scan()

How can you close a file after reading or writing in Java?

A. By using the `terminate()` method

B. By using the `close()` method of the file stream

C. By using the `readLine()` method

D. By using the `exit()` method