![]() ![]() What is the use of garbage collection in Ruby on Rails?Īnswer: Generally, garbage collection frees up memory for other processes by removing pointer programs and inaccessible objects left behind after a program executes. In Rails, this is implemented by the Action View library, which is based on Embedded Ruby (ERB) and determines how data is presented.Ĭontroller (Controller Action): The controller is like a data broker of an application, handling the logic that allows the model and view to communicate with one another. View (Action View): The view is the part of the application that the end-user sees. In Rails, the Active Record library forms the bridge between the Ruby program code and the relational database. Model (Active Record): The model handles all the data logic of the application. How does Ruby on Rails use the Model View Controller (MVC) framework?Īnswer: Web development is divided into three separate but closely integrated subsystems: Since browsers will automatically include cookies for a domain on a request, if you were recently logged in to the target site, the attacker’s request will appear to come from you as a logged-in user. This is a form of an attack where the attacker submits a form on your behalf to a different website, potentially causing damage or reveal sensitive information. What is CSRF?Īnswer: CSRF stands for Cross-Site Request Forgery. This tells ActiveRecord to retrieve the corresponding Comment and Author records for the database immediately after the initial requests for all Posts, therefore reducing the number of database requests to just three. You can avoid all of this by changing the first line on the method to: posts = Post.includes(comments: ).all To make thing worse, the code is then making even more database requests to retrieve the Author of each Comment. Post objects from the database, but then the very next line will make an additional request for eachĮach Post to retrieve the corresponding Comment objects. class CommentsController < ApplicationControllerĬomments = lect do |comment|Ĭ = paramsĪnswer: This is a classic example of the notorious “n+1” bug. Find and fix the issue in the controller code written below. Ruby does the scaffolding automatically and the users are free to concentrate on the core development only from the first day of development. These codes help to build the application in a very quick and reliable manner and also, a close eye can be kept on the working of major components with this approach. Define scaffolding and what sort of advantages does Ruby offer when it comes to the same?Īnswer: During project development, the user has to frequently write codes in the early stage of development. The extensible nature and the true object-oriented approach have also contributed to its success and popularity. The users can always make sure of less coding and with a very limited number of bugs that one can easily avoid. It is easy to learn and can simply be trusted for coming out with large scale projects without having a dependency on third-party approaches. The Ruby on Rails has rich libraries which simply make sure that users get a diverse array of support without worrying about anything. Why and how did ROR become popular and successful?Īnswer: It is an open-source approach with license needs not very complex. It is a high-level programming language with a high scope in the present and being an object-oriented approach, developers consider it for building large scale projects. This makes it one of the trusted approaches. Also, there are various abilities of the Smalltalk, as well as Perl which is combined in the framework. It is a combination of Python and therefore it is easy to use. What exactly do you know about Ruby on Rails and how well can it be defined?Īnswer: It is a server-side framework for web applications that is widely regarded as one of the best in every aspect. You should go through each one of them and assess each question and answer. Here I present to you some very important and awesome Ruby on Rails interview questions of 2019. With the advent of remote work and freelancing, the number of employees in the workforce is expanding like anything. ![]() New fields such as digital marketing, web and app development, and graphic design, have flourished and taken over many traditional job profiles. This decade has witnessed a boom in technology. ![]() Technology is revolutionizing at a rapid pace.
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