This week's book giveaway is in the OCAJP forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide 1Z0-808 and have Jeanne Boyarsky & Scott Selikoff 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.