Ruby QuizzesLevel 1 The Foundation Basic SyntaxVariables & Constants Local, Global, Instance, Class variables01_VARS Data Types String, Integer, Float, Boolean, Nil02_TYPES Control Flow If/Else, Case/When, Unless, Ternary04_FLOW Level 2 Collections Data & IterationArrays Indexing, Appending, Manipulating lists06_ARRAY Iterators Each, Map, Select, Reduce/Inject09_ITER Level 3 Methods & Scope Logic StructuresBlocks & Yield Closures, yielding to blocks, block_given?13_BLOCKS Procs & Lambdas Anonymous functions and Scope differences14_FUNC Level 4 OOP Object OrientationInheritance Superclasses, Overriding, Super keyword18_INHERIT Mixins Include vs Extend, Namespacing19_MIXIN Level 5 Core Tools Standard LibraryError Handling Begin, Rescue, Ensure, Custom Exceptions21_ERR Regex Pattern matching, scan, sub/gsub23_REG Level 6 Advanced MetaprogrammingMethod Missing Handling undefined calls dynamically27_MAGIC Introspection Send, respond_to?, class_eval29_INTRO