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FC0-U71 Practice Question: Which coding best practice improves code…
Which coding best practice improves code readability and maintainability?
⚠ Common exam trap
A common misconception is that using global variables simplifies data sharing or that hard-coding values makes code faster. In reality, these practices severely degrade maintainability and are universally discouraged in professional software development.
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
✓
Using meaningful variable names
Using meaningful variable names (option B) is a core coding best practice because it makes the code self-documenting, allowing other developers (or the original author after time) to quickly understand the purpose of each variable without needing extensive comments. This directly improves both readability and maintainability, as changes can be made with lower risk of misinterpretation. In contrast, practices like using global variables or hard-coding values obscure logic and create dependencies that are difficult to manage.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Using global variables for all data
Why it's wrong here
Global variables make code harder to debug and maintain.
- ✓
Using meaningful variable names
Why this is correct
Meaningful names clarify the purpose of variables, improving readability and maintainability.
- ✗
Hard-coding values whenever possible
Why it's wrong here
Hard-coding values reduces flexibility and makes changes difficult; constants or configurations are preferred.
- ✗
Writing long, single functions
Why it's wrong here
Long functions are difficult to read and test; smaller functions are better.
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