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.

Which of the following pairs of method invocations could NEVER be executing at the same time? (Choose all that apply.) A. x.a() in thread1, and x.a() in thread2 B. x.a() in thread1, and x.b() in thread2 C. x.a() in thread1, and y.a() in thread2 D. x.a() in thread1, and y.b() in thread2 E. x.b() in thread1, and x.a() in thread2 F. x.b() in thread1, and x.b() in thread2 G. x.b() in thread1, and y.a() in thread2 H. x.b() in thread1, and y.b() in thread2

The answer in K& B Self test book is bit confusing(Page 754).