Which three options are major issues associated with IPv4? (Choose three.)

Suppose List list = new ArrayList(). Which of the following operations are correct?

a. list.add("Red"); b. list.add(new Integer(100)); c. list.add(new java.util.Date()); d. list.add(new ArrayList());

The result of exclusive bitwise oring two bits is 1 if ____.

A. both bits are 0. B. both bits are 1. C. the bits are different. D. the bits are the same.