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220-1201 Practice Question: A technician is configuring a new workstation and…
A technician is configuring a new workstation and needs to ensure the system can address more than 4 GB of RAM. The motherboard supports 16 GB of DDR4 memory. Which UEFI setting must be verified to ensure the OS can use all installed memory?
⚠ Common exam trap
220-1201 often tests the misconception that simply installing a 64-bit OS is enough to use more than 4 GB — candidates forget that firmware-level Memory Remap must also be enabled to relocate MMIO-shadowed RAM.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable the 'Memory Remap' feature in the UEFI.
To address more than 4 GB of RAM on a 64-bit system, the UEFI must have Memory Remap (also called Memory Hole Remapping or Above 4G Decoding) enabled. This feature remaps PCI memory holes above the 4 GB boundary so the operating system can access the full physical memory. Without it, a portion of RAM is shadowed by device memory and becomes unusable.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Enable the 'Memory Remap' feature in the UEFI.
Why this is correct
Enabling 'Memory Remap' in the UEFI is crucial for systems with more than 4GB of RAM, especially when running a 64-bit operating system. This feature reconfigures the system's memory address space, allowing the CPU to access all physical RAM installed beyond the traditional 4GB boundary. Without memory remapping, the operating system would only recognize and utilize a fraction of the total installed memory, leading to underutilization of resources.
- ✗
Set the boot mode to Legacy BIOS instead of UEFI.
Why it's wrong here
Setting the boot mode to Legacy BIOS would be counterproductive for a workstation with substantial RAM, as Legacy BIOS systems inherently struggle with addressing memory beyond the 4GB threshold. This older firmware interface uses a 32-bit addressing scheme, making it incapable of fully utilizing modern memory configurations. UEFI, in contrast, supports larger address spaces and is a prerequisite for features like memory remapping, which are essential for full RAM recognition.
- ✗
Disable the integrated graphics in the UEFI.
Why it's wrong here
While disabling integrated graphics in the UEFI can free up a small portion of system RAM that was previously allocated for video memory, it does not fundamentally alter the system's ability to address physical RAM beyond 4GB. This action only reclaims shared memory within the existing addressable range. The core issue of recognizing and utilizing high-capacity RAM modules requires a different architectural solution, such as memory remapping, rather than simply optimizing shared resources.
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Change the SATA mode from AHCI to RAID.
Why it's wrong here
Changing the SATA mode from AHCI to RAID in the UEFI primarily affects how the system's storage controllers manage connected hard drives or SSDs. AHCI (Advanced Host Controller Interface) provides native SATA features like hot-swapping and NCQ, while RAID (Redundant Array of Independent Disks) enables data redundancy or performance improvements across multiple drives. Neither of these storage-centric configurations has any direct impact on the system's ability to recognize, address, or utilize installed RAM capacity.
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Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official CompTIA exam blueprint
This 220-1201 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 220-1201 exam.