better class diagram for chain of responsibility pattern

Replace temp with query question?

Yup - there is a mistake... in the Context class instead of "return strategy.execute(a, b)" should be "return strategy.algorithm(a, b)", because Strategy class doesn't have "execute" method

Where are the interactive lessons?

Button `Catalog` redirects to refactoring object.

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I cannot view previous lessons again

Congratulations

The Course is Great, however if there are more practice and real code? it should be perfect!

Comments on pseudocode in english