What do you call a file whose code can be utilized by more than one program?

The correct choice refers to a file designed to include routines or functions that can be accessed by multiple programs, allowing for code reusability and efficient memory usage. This type of file plays a crucial role in software development, enabling developers to write code once and utilize it across various applications rather than duplicating the same code in each program.

Library files are specific types of files that contain pre-written code which can be called upon by different applications. These libraries may contain functions for performing common tasks, thereby speeding up the development process and helping maintain consistency across different applications. When a program needs to use the functions in a library file, it typically includes a reference to that library in its own code, allowing it to 'share' the functionalities encapsulated within.

In contrast, executable files are standalone programs that can be run directly without external dependencies. Common files are a vague term and don't specify their purpose in programming contexts. Shared files could imply files shared over a network but do not specifically indicate their use for library functions.

Understanding this concept is essential for software development, as utilizing library files allows for modular design, reduces code duplication, and enhances maintainability and collaboration among developers.