Ruby on Rails Interview Questions and Answers

Ruby on Rails Interview Questions and Answers

Ruby on Rails (“Rails”) is a web development framework written in the Ruby programming language. Since its debut in 2004, Ruby on Rails has rapidly become one of the most powerful and popular tools for building dynamic web applications. Rails is a server-side programming web application framework written in Ruby programming under the MIT License. Rails is a MVC framework, providing default structures for a database, a web service, and web pages. It encourages and facilitates the use of web standards such as JSON or XML for data transfer, and HTML, CSS and JavaScript for display and user interfacing. In addition to MVC, Rails emphasizes the use of other well-known software engineering patterns and paradigms, including convention over configuration (COC), don’t repeat yourself (DRY), and the active record pattern.

First version Rails 1.0 December 13, 2005   -Announcement.

Current version- Rails 5.2.0 – April 9, 2018    –  Released

What is Rails?

What is different about Rails?

What are the major features in Rails 5.1?

What is the new in rails 5.2.0?

What are the benefits of using RoR (Ruby on Rails)?

What is Ruby on Rails?

What is class libraries in Ruby?

Why does MVC make sense in Rails?

What is the scaffolding in Ruby on Rails?

Mention what is the naming convention in Rails?

What is “Yield” in Ruby on Rails?

What is ORM (Object-Relationship-Model) in Rails?

Mention what the difference is between false and nil in Ruby?

What is the role of sub-directory app/controllers and app/helpers?

What is the difference between String and Symbol?

Explain how Symbol is different from variables in ROR?

What is Rails Active Record in Ruby on Rails?

Explain how Rails implements Ajax?

Mention how you can create a controller for subject?

Mention what is Rails Migration?

List out what can Rails Migration do?

What is the command to create a migration?

When self.up and self.down method is used in Ruby on Rails?

What is request.xhr in Ruby on Rails?

What is the role of Rails Controller?

What is the difference between Active support’s HashWithIndifferent and Ruby’s Hash?

What is Cross-Site Request Forgery (CSRF) and how Rails is protected against it?

What is active record in Ruby on rails?

Explain how you can run Rails application without creating databases?

What is the difference between the Observers and Callbacks in Ruby on Rails?

What is rake in Rails?

Explain how you can list all routes for an application?

What is sweeper in Rails?

Mention the log that has to be seen to report errors in Ruby Rails?

Explain what is the difference between Dynamic and Static Scaffolding?

Mention what is the function of garbage collection in Ruby on Rails?

What is the difference between redirect and render in Ruby on Rails?

What is Session and Cookies in Ruby on Rails?

What is the purpose of RJs in Rails?

Explain what is Polymorphic Association in Ruby on Rails?

How to use Nested routes in ROR?

What is the difference between a plugin and a gem?

Mention what are the limits of Ruby on Rails?

What is difference between -%> and %> in ROR?

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