Which programming concept is a static entity most similar to?

A static entity in programming refers to a type that is defined at compile time and maintains a fixed set of values. This concept aligns closely with enumeration, which is a distinct data type consisting of a set of named values or constants. Enumerations provide a way to define these sets of constants in a readable and maintainable manner, making it easier for developers to understand the possible values a variable can take on.

The essence of enums is to create a limited set of predefined values, establishing a clear relationship between the static nature of these values and the type itself. This characteristic is what makes enumeration the correct choice, reflecting how static entities operate within a defined scope.

In contrast, linked lists and hash maps are more dynamic data structures that allow for variable-sized collections, and static variables, while also retaining data, are primarily about the visibility and lifespan of a variable within a specific context, rather than defining a set of fixed, named entities. Therefore, enumerations are the most closely related concept when discussing static entities.