FC0-U71 Applications and Software Practice Question
A user needs to open a document that was created in a proprietary format by a legacy application. The user does not have that application installed. Which of the following is the BEST solution to view the document's content without installing additional software?
⚠ Common exam trap
The trap here is thinking that changing the file extension or using Compatibility Mode can make a file readable; these methods do not convert the underlying data format.
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
✓
Use a web-based file converter to change the document to a common format like PDF.
Using a web-based converter to change the file to PDF is the best solution because it requires no software installation and leverages a common format. The other options involve installing software, misusing file extensions, or relying on a feature that doesn't address the missing application. The converter approach directly solves the problem of viewing the content.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Change the file extension to .txt and open with Notepad.
Why it's wrong here
Changing the file extension does not convert the file format; it only changes how the operating system associates the file. Opening a proprietary binary file in Notepad will likely display garbled characters and not the intended content. This approach risks corrupting the file and does not provide a readable view of the document's content.
- ✗
Use the Compatibility Mode settings in Windows to emulate the legacy application.
Why it's wrong here
Compatibility Mode in Windows adjusts settings for older programs to run on newer Windows versions, but it does not emulate a different application. It cannot open a file format that requires a completely different program. Without the legacy application installed, Compatibility Mode is irrelevant and cannot help view the document.
- ✗
Install a virtual machine with the legacy operating system and application.
Why it's wrong here
Installing a virtual machine and the legacy application would work but requires significant resources, including a licensed copy of the legacy OS and application, plus virtualization software. This is not the best solution because it involves installing additional software and is time-consuming. The question asks for a solution without installing additional software, so this option fails that criterion.
- ✓
Use a web-based file converter to change the document to a common format like PDF.
Why this is correct
Web-based file converters can transform proprietary formats into universally readable formats like PDF without installing software. This allows the user to view the content using a PDF reader, which is typically already available. It is a practical solution when the original application is unavailable, though care must be taken with sensitive data due to privacy concerns with online converters.
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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
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