15 Questions To Ask During a Ruby Interview

Ruby Questions

• What is a class?
• What is an object?
• What is a module? Can you tell me the difference between classes and modules?
• Can you tell me the three levels of method access control for classes and modules? What do they imply about the method?
• There are three ways to invoke a method in ruby. Can you give me at least two?
• Explain this ruby idiom: a ||= b
• What does self mean?

Answers to questions

More Ruby Questions

• What is difference between unit, functional, integration testing?
• Tell me about the Ruby Object Model.
• What happens when you include a module on a class? What about extending a module on a class? Why?
• What happens when you include a module on an instance? What about extending a module on an instance? Why?
• What is a Proc?

Rails Questions

• What is a named scope?
• What is the difference between includes and joins.
• How would you implement basic caching?
• How about partial page caching?
• What is a polymorphic association?
• What is a has and belongs to many association?
• What is Rack?
• What is the purpose of Active Record?
• What is the purpose of Active Support?
• What would you store in a Session?

General Questions

• What is HTTP?
• Explain is as much possible detail what happens when you make a request in your browser.
• Explain REST
• What is a HTTP response for?
• What is a HTTP request for?
• What does it mean for a request to be idempotent? What types of requests are idempotent?
• What are cookies for?
• Explain inner, outer, left and right joins. Hint