“REDUCE” .compareTo(“REVOLT”) + “ANTARTICA” lastIndexOf(‘A’)

Solution

Here compareTo() function returns the difference in two strings if they are not equal,if they are equal then returns zero

So, “REDUCE” .compareTo(“REVOLT”) results to 68-86

and, “ANTARTICA”.lastIndexOf(‘A’) results to 8

On adding these two (68-86)+8
=>-18+8
=>-10,this is the result