Which variables name uses a standard naming convention for module variables
The Correct Answer and Explanation is:
Correct Answer: MAX_CONNECTIONS
Explanation
In programming, especially in Python and many other modern languages, naming conventions help developers write clear, readable, and maintainable code. For module-level variables, which are variables defined at the top level of a module (i.e., not inside functions or classes), there are specific naming conventions that developers are encouraged to follow.
The standard naming convention for module-level constants is to use all uppercase letters with words separated by underscores. This makes the variable easily identifiable as a constant — something that should not be changed during the execution of the program.
So, the name MAX_CONNECTIONS follows this convention:
- It is written in UPPERCASE to indicate that it is a constant.
- Words are separated by underscores to improve readability.
- It is defined at the module level, meaning it is likely accessible throughout the module or even externally if the module is imported.
This convention is outlined in PEP 8, which is the style guide for Python code. Even in other languages like JavaScript or C, similar conventions are used for constants, although style guides can differ slightly in specifics (e.g., const MAX_CONNECTIONS = 100 in JavaScript).
Why this matters:
- Readability: Other programmers immediately understand that
MAX_CONNECTIONSis not expected to change. - Maintainability: If a constant value ever needs to be updated, it can be done in one place.
- Best practices: Following widely accepted conventions reduces the cognitive load for new developers reading your code.
In contrast, other types of variables, such as regular variables or instance variables, typically use lowercase or camelCase naming conventions (e.g., max_connections, userCount, etc.), which helps distinguish them from constants.
In summary, MAX_CONNECTIONS is a properly named module-level variable following standard conventions, making it a good example of clean, professional code.
