The correct answer is to enable the 'Memory Remap' feature in the UEFI. This setting is essential because, by default, the UEFI reserves a block of memory addresses for PCIe devices and other hardware, which can cap usable RAM at around 3.5 GB even if more is physically installed. Enabling memory remapping reassigns those reserved addresses above the 4 GB boundary, allowing a 64-bit operating system to access the full 16 GB of DDR4 memory. On the CompTIA A+ Core 1 220-1201 exam, this concept tests your understanding of how firmware and hardware addressing interact, often appearing in scenarios where a system shows less RAM than installed. A common trap is assuming a 64-bit OS alone guarantees full RAM usage—without memory remapping enabled in the UEFI, the OS cannot see the extra memory. Remember the mnemonic: "Remap to Uncap" — enabling remapping removes the 4 GB cap.
220-1201 BIOS / UEFI Practice Question
This 220-1201 practice question tests your understanding of bios / uefi. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
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?
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.
For systems with more than 4 GB of RAM, the OS must be 64-bit, and the firmware must have memory remapping enabled. This feature allows the UEFI to reassign memory addresses previously reserved for PCI devices, making the full RAM capacity available to the OS.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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
Memory remapping reallocates the address space above 4 GB so the OS can use all installed RAM; without it, the system may only see 4 GB or less.
Related concept
Read the scenario before looking for a memorised answer.
✗
Set the boot mode to Legacy BIOS instead of UEFI.
Why it's wrong here
Legacy BIOS has a 4 GB address space limitation for memory; UEFI is required for memory remapping and full RAM support.
✗
Disable the integrated graphics in the UEFI.
Why it's wrong here
Disabling integrated graphics may free some memory but does not enable the system to address RAM above 4 GB; it's not the primary solution.
✗
Change the SATA mode from AHCI to RAID.
Why it's wrong here
SATA mode affects storage controllers, not memory addressing; it has no impact on RAM capacity recognition.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the 220-1201 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 220-1201 question in full detail.
Identify which 220-1201 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
BIOS / UEFI — This question tests BIOS / UEFI — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable the 'Memory Remap' feature in the UEFI. — For systems with more than 4 GB of RAM, the OS must be 64-bit, and the firmware must have memory remapping enabled. This feature allows the UEFI to reassign memory addresses previously reserved for PCI devices, making the full RAM capacity available to the OS.
What should I do if I get this 220-1201 question wrong?
Identify which 220-1201 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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