What will be the output of the following code snippet when combined with suitable declarations and run?

StringBuffer city = new StringBuffer("Madras"); 
StringBuffer string = new StringBuffer( ); 
string.append(new String(city)); 
string.insert(0, "Central "); 
String.out.println(string);

State the method that:

(i) converts a string to a primitive float data type.

(ii) determines if the specified character is an uppercase character.

Write a program to do the following :

(a) To output the question "Who is the inventor of Java" ?

(b) To accept an answer.

(c) To print out "Good" and then stop, if the answer is correct.

(d) To output the message "try again", if the answer is wrong.

(e) To display the correct answer when the answer is wrong even at the third attempt and stop.

Give the output of the following program :

class MainString
{
    public static void main(String[ ] args)
    {
        StringBuffer s = new StringBuffer("String"); 
        if((s.length( ) > 5) && 
        (s.append("Buffer").equals("X")))
        ;	// empty statement
        System.out.println(s);
    }
}