What will be the output of the following program? public class Test public static void main(String args[]) String str1 = "one"; String str2 = "two"; System.out.println(str1.concat(str2));

Answer: Option C

Concat() method appends one String to the end of another. The method returns a String with the value of the String passed into the method appended to the end of the String which is used to invoke this method.