A Level Computer Science OCR Practice Exam

Why are library routines favored by programmers?

1. They allow unrestricted editing of code

2. They provide reliable and tested functions to save time

3. They eliminate the need for any error checking

4. They are always the fastest options available

The correct answer is: They provide reliable and tested functions to save time

Library routines are favored by programmers primarily because they offer reliable and tested functions that save considerable development time. When developers utilize these pre-defined routines, they can leverage code that has already been validated and optimized, reducing the likelihood of introducing bugs into their applications. This efficiency allows programmers to focus on the unique aspects of their projects rather than reinventing common functionalities that libraries already provide. Additionally, using library routines helps maintain consistency across various projects since they are built using standard practices. This standardization ensures better maintainability and easier collaboration, as multiple programmers are likely to understand and work with these familiar routines. Overall, the reliability and time-saving aspects of library routines make them an essential tool in a programmer's toolkit.