Ruby interview questions and answers

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Overview of Ruby programming language.

An open source programming language that focuses on simplicity and productivity. The syntax of Ruby language is elegant which is natural to read and easy to write. Ruby is well known as language of careful balance. It has the blended features of Perl, Small talk, Eiffel, Ada and Lisp................

What is Rails?

Ruby on Rails is an open source web application framework for the Ruby programming language............

Describe class libraries in Ruby.

The Ruby standard library extends the foundation of the Ruby built-in library with classes and abstractions for a variety of programming needs, including network programming, operating system services, threads, and more............

Explain the concepts and capabilities of garbage collection feature of Ruby.

Ruby is an object oriented language and every object oriented language tends to allocate many objects during execution of the program.............

Describe the environment variables present in Ruby.

RUBYOPT, RUBYLIB, RUBYPATH, RUBYSHELL,RUBYLIB_PREFIX...................

Interpolation is a very important process in Ruby, comment.

Interpolation is the process of inserting a string into a literal..............

What is the use of super in Ruby Rails? 

Ruby uses the super keyword to call the superclass implementation of the current method.............

What is the use of load and require in ruby? 

Reuire() loads and processes the Ruby code from a separate file, including whatever classes, modules, methods, and constants are in that file into the current scope..............

Explain the use of global variable $ in Ruby.

If you declare one variable as global we can access any where, where as class variable.............

Explain the difference between nil and false in ruby.  

False is a boolean datatype
Nil is not a data type..............