Answer Posted / Shashi Kumar

Symbols in Ruby are objects that represent unique identifiers for method names, attribute names, and constant names. Unlike variables, they are immutable and have a faster lookup time because they are cached by the interpreter. They are defined using colons like :symbol_name. Variables, on the other hand, are declared using variables names such as variable_name and can hold any value.

Tell me the role of modules and mixins in ruby?

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