This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
1 would not be correct because there is no default constructor defined, but there are two defined that take parameters (so that means that the default is not created by the compiler). The only correct answer is 4.