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);

What will be the output for the following program segment?

String s = new String ("abc");
System.out.println(s.toUpperCase( ));

If:

String x = "Computer";  
String y = "Applications";

What do the following functions return?

(i) System.out.println(x.substring(1,5));

(ii) System.out.println(x.indexOf(x.charAt(4)));

(iii) System.out.println(y + x.substring(5));

(iv) System.out.println(x.equals(y));

What will the following code output:

String s = "malayalam";
System.out.println(s.indexOf('m'));
System.out.println(s.lastIndexOf('m'));