Ruby Basics

Question 1

Is Ruby purely OOP Language? Why?

Answer 1

Ruby is purely object oriented programming language. Each and every value is an object. Every object has a class and every class has a super class. Every code has their properties and actions. Ruby is influenced with Smalltalk language. Rules applying to objects applies to the entire Ruby.

Question 2

What are the Primitive datatypes in Ruby?

Answer 2

There are no primitive data types in Ruby. Every value is an object, even literals are turned into objects:

Question 3

What type of Inheritance Ruby will support?

Answer 3

Single class inheritance.
Ruby does not have multiple inheritance. Ruby has something similar though: mixins.

Question 4

Who are the authors of Ruby and Rails?

Answer 4

Ruby - Yukihiro Matsumoto

Rails - David Heinemeier Hansson

Question 5

Why Ruby is known as a language of flexibility?

Answer 5

Ruby is known as a language of flexibility because it facilitates its author to alter the programming elements. Some specific parts of the language can be removed or redefined. Ruby does not restrict the user.