Libraries Practice Test

A student is writing a program that simply adds two user-provided numbers and displays the result. The student considers importing a large, advanced scientific computing library that contains thousands of procedures. Which of the following is the most appropriate evaluation of this choice?

A programmer needs to sort a large list of names alphabetically. The programmer can either write a custom sorting algorithm or use a sorting procedure from a standard, built-in library. Why is using the library procedure often a better choice?