In scripting, what kind of component allows modular, reusable code to be invoked by name across a program?

• A. Module
• B. Function
• C. Class
• D. Macro

Answer: (B)

A function is a named block of code designed for reuse. You define it once and then call it from different parts of your script by its name, optionally passing input values and receiving a result. This makes code modular and maintainable: you encapsulate a task in one place and reuse it wherever needed, which is exactly what it means to invoke code by name across a program.

A module, while related, is more about grouping related definitions under a namespace and typically being imported as a unit rather than invoked directly by name to perform a task. A class describes a blueprint for objects and is used by creating instances and calling methods on those instances, rather than calling a standalone block of code by name. A macro expands code before or during interpretation/compilation and isn’t the typical runtime unit you invoke by name for general-purpose tasks in scripting.