Questions: Active Records Basics and Associations

Basics

What is the Active Record?

What is ORM?

What is the difference between Article and articles?

What does 'Convention over Configuration' mean?

What is CRUD?

What are Migrations?

Name and explain three types of associations.

What is the difference between belongs_to and has_one?

Where do you declare associations?

This is my private wiki mainly for appointment organization. My web page is located at http://bkleinen.github.io.