FC0-U61 · Question #211
An end-user has 16GB of RAM installed on a computer system. Which of the following describes why the OS only uses a maximum of 4GB of RAM?
The correct answer is D. The operating system is 32-bit.. If a computer has 16GB of RAM but the OS only uses 4GB, it indicates the operating system is 32-bit.
Question
An end-user has 16GB of RAM installed on a computer system. Which of the following describes why the OS only uses a maximum of 4GB of RAM?
Options
- AThe operating system is 16-bit.
- BThe computer has corrupted RAM.
- CThe computer has a defective motherboard.
- DThe operating system is 32-bit.
- EThe computer has a virus.
How the community answered
(20 responses)- B5% (1)
- C5% (1)
- D90% (18)
Why each option
If a computer has 16GB of RAM but the OS only uses 4GB, it indicates the operating system is 32-bit.
A 16-bit operating system would have an even more restrictive memory addressing limit, far less than 4GB, making this incorrect.
Corrupted RAM would likely cause system instability or errors, not a precise 4GB usage limit when more is available.
A defective motherboard might prevent RAM from being recognized, but the 4GB limit points specifically to an OS architectural constraint.
A 32-bit operating system is architecturally limited to addressing a maximum of 2^32 bytes of physical memory, which equates to approximately 4 gigabytes (GB). Even if more RAM is physically installed in the system, the 32-bit OS cannot directly access or utilize memory beyond this 4GB boundary.
A virus might consume system resources but would not impose a hard architectural limit on the total addressable RAM at exactly 4GB.
Concept tested: Operating system architecture and memory addressing
Source: https://learn.microsoft.com/en-us/windows/win32/memory/memory-limits-for-windows-releases#physical-memory-limits
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