CompTIA
220-802 · Question #399
220-802 Question #399: Real Exam Question with Answer & Explanation
The correct answer is C: Windows 7 64-bit. Only a 64-bit operating system can address more than 4GB of physical RAM due to its wider memory address space. 32-bit operating systems are architecturally limited to a 4GB address space.
Question
Which of the following operating systems is capable of fully utilizing more than 4GB of system RAM?
Options
- AWindows Vista Ultimate
- BWindows 7 32-bit
- CWindows 7 64-bit
- DWindows XP Professional
Explanation
Only a 64-bit operating system can address more than 4GB of physical RAM due to its wider memory address space. 32-bit operating systems are architecturally limited to a 4GB address space.
Common mistakes.
- A. Windows Vista Ultimate in a 32-bit edition is limited to approximately 4GB of addressable memory just like all other 32-bit Windows versions.
- B. Windows 7 32-bit uses a 32-bit address space, which limits usable RAM to roughly 3.2-4GB regardless of how much physical RAM is installed.
- D. Windows XP Professional is a 32-bit operating system and cannot address more than 4GB of RAM.
Concept tested. 32-bit vs 64-bit RAM addressing limitations
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