Explain valid and invalid in rails?
difference between form_for and form_tag
when self.up and self.down method is used?
What are filters? and how many types of filters are there in ruby
Why ruby on rails is used for?
What are generators in ruby on rails?
What is the architecture of Model views and controllers
What is the symbol garbage collector?
what is the role of Rails Controller?
What is a proc ?
what is the use of super function in ruby on rails?
I would like to know about ruby on rails.I want to know.how will be the future for ruby on rails.please tell me.
write a program to show the usage of sql in the database file?