- A
Roll back all 50 computers to Windows 10 using the recovery partition.
Why wrong: Rolling back is time-consuming and prevents the company from benefiting from Windows 11; it should be a last resort, not the first step.
- B
Reinstall the application on each computer in Windows 10 compatibility mode.
Setting the application to run in Windows 10 compatibility mode often resolves compatibility issues without needing to revert the OS, making it the most efficient solution.
- C
Enable Hyper-V on each computer and run the application in a Windows 10 virtual machine.
Why wrong: While this would work, it is resource-intensive and adds complexity; compatibility mode is a simpler and more efficient first step.
- D
Use the Windows 11 'Reset this PC' feature to reinstall Windows 11 and then reinstall the application.
Why wrong: Resetting the PC would not fix the compatibility issue; it would only reinstall Windows 11, and the application would still likely fail.
Quick Answer
The answer is to reinstall the application on each computer in Windows 10 compatibility mode. This is the most efficient solution because Windows 11 includes a built-in compatibility layer that mimics the Windows 10 environment for legacy applications, allowing the line-of-business app to run without requiring a full OS rollback. On the CompTIA A+ Core 2 220-1202 exam, this scenario tests your knowledge of application compatibility troubleshooting and the use of the Program Compatibility Troubleshooter or Application Compatibility Toolkit (ACT) to resolve "application not working after Windows 11 upgrade" issues. A common trap is assuming you must uninstall the upgrade or modify system-wide settings, but the exam emphasizes targeted, per-application fixes. Memory tip: think "Compatibility Mode, not Rollback Mode"—you fix the app, not the OS.
220-1102 Windows OS Troubleshooting Practice Question
This 220-1202 practice question tests your understanding of windows os troubleshooting. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 company is migrating from Windows 10 to Windows 11 on 50 computers. After the upgrade, several users report that a critical line-of-business application no longer works. The application ran fine on Windows 10. You need to get it working without rolling back the entire OS. What is the most efficient solution?
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
Reinstall the application on each computer in Windows 10 compatibility mode.
Windows 11 includes a Windows 10 compatibility mode that can be applied to individual applications. Using the Application Compatibility Toolkit (ACT) or the built-in compatibility troubleshooter to set the application to run in Windows 10 compatibility mode is the most efficient fix, as it does not require a full OS rollback.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Roll back all 50 computers to Windows 10 using the recovery partition.
Why it's wrong here
Rolling back is time-consuming and prevents the company from benefiting from Windows 11; it should be a last resort, not the first step.
- ✓
Reinstall the application on each computer in Windows 10 compatibility mode.
Why this is correct
Setting the application to run in Windows 10 compatibility mode often resolves compatibility issues without needing to revert the OS, making it the most efficient solution.
Related concept
Static NAT maps one inside address to one outside address.
- ✗
Enable Hyper-V on each computer and run the application in a Windows 10 virtual machine.
Why it's wrong here
While this would work, it is resource-intensive and adds complexity; compatibility mode is a simpler and more efficient first step.
- ✗
Use the Windows 11 'Reset this PC' feature to reinstall Windows 11 and then reinstall the application.
Why it's wrong here
Resetting the PC would not fix the compatibility issue; it would only reinstall Windows 11, and the application would still likely fail.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 220-1202 NAT questions on configuration and troubleshooting.
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Windows OS Troubleshooting — study guide chapter
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FAQ
Questions learners often ask
What does this 220-1202 question test?
Windows OS Troubleshooting — This question tests Windows OS Troubleshooting — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Reinstall the application on each computer in Windows 10 compatibility mode. — Windows 11 includes a Windows 10 compatibility mode that can be applied to individual applications. Using the Application Compatibility Toolkit (ACT) or the built-in compatibility troubleshooter to set the application to run in Windows 10 compatibility mode is the most efficient fix, as it does not require a full OS rollback.
What should I do if I get this 220-1202 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 220-1202 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 19, 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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