Answer Posted / Sumit Kumar Gautam

Freezing a string in Ruby means making it immutable, which prevents modifications to the string's contents. In Ruby 1.8.7 and earlier versions, strings were mutable by default; however, in modern versions, all strings are frozen upon creation. To freeze a string, you can use the `freeze` method or assign the string to a constant.

Tell me the role of modules and mixins in ruby?

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