- A
Increase the amount of RAM allocated to the VM.
Why wrong: RAM affects overall performance but does not improve display resolution or mouse responsiveness.
- B
Install the guest additions for the VM.
Guest additions install drivers that enable higher resolutions and smooth mouse integration.
- C
Update the host operating system to the latest version.
Why wrong: Host OS updates do not affect the VM's virtual hardware drivers.
- D
Change the VM's network adapter from NAT to bridged.
Why wrong: Network adapter settings affect connectivity, not display or input performance.
Question 421 of 750
Resolving VM Display and Input Issues with Guest Additions
This 220-1202 practice question tests your understanding of virtualization and cloud technologies. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 needs to create a virtual machine that will host a legacy application requiring Windows XP. The host runs Windows 11. After creating the VM and installing Windows XP, the technician notices that the mouse cursor is lagging and the screen resolution is stuck at 800x600. What should the technician do to resolve this?
Quick Answer
The answer is to install the guest additions for the virtual machine. Guest additions, also known as integration services, provide optimized drivers for the virtual hardware, including the mouse and display adapter, which resolves the laggy cursor and low 800x600 resolution by replacing the basic VGA drivers that Windows XP uses by default. On the CompTIA A+ Core 2 220-1202 exam, this scenario tests your understanding of virtualization configuration and driver dependencies, often appearing as a trap where students mistakenly choose to update the host OS or increase RAM—neither of which addresses missing virtual drivers. Remember, a fresh VM without guest additions will always suffer from poor display and input performance, regardless of host specs. A helpful memory tip: "No additions, no resolution—guest tools fix the mouse and the pixels."
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
✓
Install the guest additions for the VM.
The mouse lag and limited screen resolution (800x600) indicate that the VM lacks proper integration with the host, which is resolved by installing guest additions. Guest additions provide optimized drivers for video, mouse, and other hardware, enabling smooth cursor movement and higher resolutions. This is a standard step after installing any guest OS in a hypervisor like Hyper-V or VirtualBox.
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.
- ✗
Increase the amount of RAM allocated to the VM.
Why it's wrong here
RAM affects overall performance but does not improve display resolution or mouse responsiveness.
- ✓
Install the guest additions for the VM.
Why this is correct
Guest additions install drivers that enable higher resolutions and smooth mouse integration.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Update the host operating system to the latest version.
Why it's wrong here
Host OS updates do not affect the VM's virtual hardware drivers.
- ✗
Change the VM's network adapter from NAT to bridged.
Why it's wrong here
Network adapter settings affect connectivity, not display or input performance.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse performance issues with resource allocation (RAM) or network settings, overlooking the fundamental requirement for guest additions (or integration services) to enable proper hardware support in the guest OS.
Detailed technical explanation
How to think about this question
Guest additions (or Integration Services in Hyper-V) install paravirtualized drivers that bypass emulated hardware, allowing the guest OS to communicate directly with the hypervisor for video, mouse, and time synchronization. Without these drivers, the VM relies on basic VESA-compatible display emulation, which caps resolution at 800x600 and causes input lag due to inefficient polling. In real-world scenarios, failing to install guest additions is a common oversight that leads to poor user experience and can prevent features like dynamic memory or clipboard sharing from working.
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.
TExam Day Tips
- 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 small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
Visual reference
What to study next
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FAQ
Questions learners often ask
What does this 220-1202 question test?
Virtualization and Cloud Technologies — This question tests Virtualization and Cloud Technologies — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Install the guest additions for the VM. — The mouse lag and limited screen resolution (800x600) indicate that the VM lacks proper integration with the host, which is resolved by installing guest additions. Guest additions provide optimized drivers for video, mouse, and other hardware, enabling smooth cursor movement and higher resolutions. This is a standard step after installing any guest OS in a hypervisor like Hyper-V or VirtualBox.
What should I do if I get this 220-1202 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
This 220-1202 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 220-1202 exam.
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