Which of the following operating systems is capable of fully utilizing more than 4GB of system
RAM?
A.
Windows Vista Ultimate
B.
Windows 7 32-bit
C.
Windows 7 64-bit
D.
Windows XP Professional
Explanation:
http://www.zdnet.com/blog/hardware/max-memory-limits-for-64-bit-windows-7/4254
Based on the reference, the Windows Vista Ultimate would also be an answer as well.