Who designed active record in rails?
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what is different between activerecord::relation's count, length and size methods?
What is rails scaffolding?
What is the difference between Render vs. Redirect_to in ruby on rails ?
What are the different types of association relationships that exist?
How are blocks created?
Do you know what is cross-site request forgery (csrf) and how rails is protected against it?
What is the architecture of Model views and controllers
What is a ruby singleton method ?
Explain the features of ruby on rails.
What is the symbol garbage collector?
What is the main difference between procs and blocks?
how you can run Rails application without creating databases?