Web site interactivity goes beyond simple site navigation through hyperlinks.

Would the formulas in questions 5 and 6 also apply to heavy equipment, such as a bulldozer? Why or why not?

What will be an ideal response?

What will be the output of the following program?

import java.util.HashMap; import java.util.Hashtable; import java.util.Map; public class Program { public static void main(String... args) { String k1 = "key1"; Map map = new Hashtable(); map.put(k1, "value1"); map.put(null, "value2"); System.out.println(map.get(k1)); System.out.println(map.get(null)); } } a. A NullPointer Exception will be thrown. b. value1 value2 c. value1 d. value1 null