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|Types of Ruby On Rails Interview Questions|
Frequently Asked Ruby On Rails Interview Questions
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|Controller||It is basically the subdirectory where the controller classes are located|
|Views||It generally holds the display templates which are important and are required to fill the data from the application|
|Helpers||It holds helper class that are useful and helpful in managing the other classes|
|Models||It holds classes that generally model the data which is stored in the application database|
It is a server-side framework for web applications that is widely regarded as best in every aspect. It is a combination of python and therefore it is easy to use. Also, there are various abilities of Smalltalk, as well as Perl which have been combined in this framework which makes it one of the trusted approaches. It is basically a high-level programming language with a wide scope in the present time and being an object-oriented approach, it has widely been considered for building large-scale projects.
Its main aim is to make sure that the relation between the object and the database is maintained and all the validations can be considered on time.
Well, everything has a few cons associated with it. Thus there are a few which are common with this framework as well. The first thing is it sometimes faces performance issues due to its complex nature. As it doesn’t depend on the native threads, the same is often simulated in the Virtual Machine rather than in the Operating system. Also, the requirements on the workstation where it is to be installed are complex in terms of hardware requirements.
This web application framework offers users a program which is called ERB. It actually stands for Embedded Ruby. This can be considered when it comes to putting the codes that are associated to Ruby into the HTML files directly. Even when they are complex, the users have nothing to worry about and this is the best thing about this program.
It is necessary to keep the code between <%and>% for its proper execution in the Ruby environment. The same should be placed between <%+=and%> in case the same need to be printed.
Well, Ruby has all that a perfect web application framework actually needs to have and the best thing is web applications can be developed at a very fast rate when compared with Java or any other parallel framework. Even when it comes to developing database-backed web applications, the users are free to proceed and to keep up the pace simply. The next good thing is there is actually no need for the users to worry about the compilation phase required. Also, the users are free to configure the code with the database very easily.
This can be done with the help of the model view controller pattern in Ruby. Also, the users can easily make sure of a code that is not very bulky when it comes to developing the same.
It widely supports Metaprogramming and unlike other frameworks, all the codes can be written through this approach very easily and without taking the other programs which are complex into consideration. Also, the tasks which are heavy can be accomplished with this approach in no time which is one of the best things in the ruby.
This is basically an important feature in Ruby which makes sure that the traffic is to be directed on one hand and the querying of the models can be done in a reliable manner. It also organizes and specifies data into a form that is suitable all over the domain.
It is basically a sub-section of Ruby and the version is very useful for handling some very essential tasks in the columns in the database. The column can be used again for handling other important tasks very easily.
While developing the projects, the users often have to write codes in the early stage of development. These codes help to build the application in a very reliable manner and quickly and also, a close eye can be kept on the working of some major components with this approach. In Ruby, the scaffolding is done automatically and the users are free to concentrate on the core development only from the first day of development.
These are basically the supporting codes with the help of which the users can easily write and can run the test cases. With the help of a rake, the users can then simply proceed with the automated tests.
There should be a database system installed on the system and a webserver to store and control all the activities and concerning programs. Also, the Rails framework and installation of Ruby should be done in a reliable manner. The users can go ahead with the WeBrick server which comes with this framework. Generally, there are other options as well that most of the users often go with and they are Apache and TPD.
These are PostgreSQL, DB2, MySQL, SQL as well as SQLite
There are actually three important tasks that the users should be careful about and they are:
The very first thing is to describe as well as model the application domain. Next is to specify what can actually happen in the domain and what the critical factors to pay attention to are. The user must also pay a close attention to the views of the design available from those who have already considered the same
MVC stands for Model View Controller. The subsystems in which it divides the work of an application are:
1. Active Record
2. Action Controller
3. Action View
Simply create a database on PostgreSQL for holding your data on the server. It would also be good if you create a basic skeleton or a clone of the application in the initial stage.
The same can be located in the controller Subdirectory
They generally consist of domains like thread programming, data types, as well as other useful domains which are relevant in the development.
The same indicates clearly that all the classes are mapped to the systems in the shortest possible time and the best part is the users are free to keep up the pace in the long run. It also represents that the classes are mapped to the rows and the tables.
It simply makes sure that the pointer values should be removed reliably which is left behind after the execution of a program takes place. Also, the users can relax on tracking the objects again and again in the long run. All the objects which are no longer required can directly be moved from the memory with this approach.
Symbols are generally immutable whereas the String in ruby is mutable. Symbols are more likely a string rather than a simple variable. The users can easily keep up the pace with a single copy of the symbol. On the other hand, a single variable is not sufficient for the users. In addition to this, the users are free to use the symbols against the enums which are not possible in the case of variables.
It is basically an approach with the help of which the users can make the changes to the already existing database Schema in Ruby and can implement a version control system. The main aim is to synchronize the objects to get quality outcomes.
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It is very much similar to that of Callback. They can be deployed directly in case the methods are not integrated with the lifecycle of the object. It is possible for the users to attach the observer to any file and perform the reverse action by the user.
These are Static and Dynamic Scaffolding
Ravindra Savaram is a Content Lead at Mindmajix.com. His passion lies in writing articles on the most popular IT platforms including Machine learning, DevOps, Data Science, Artificial Intelligence, RPA, Deep Learning, and so on. You can stay up to date on all these technologies by following him on LinkedIn and Twitter.