Answer Posted / Vijai Singh

"Class libraries in Ruby are collections of pre-written classes and modules that provide common functionality. They are built into the Ruby standard library and can be used to perform various tasks such as file I/O, string manipulation, mathematics, web services, etc. To use a class from a library, you simply include it in your code using the 'require' or 'load' method."

Tell me the role of modules and mixins in ruby?

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