Ruby on rails interview questions and Answers

• It enables removal of pointer values that are left behind after the program execution ends.
• It releases the programmer from tracking objects that get created dynamically on runtime.
• It facilitates the removal of distant objects from the memory so that other processes can use the memory.

Redirect is used to issue the error message when the page is not found in the browser. This function tells the browser to issue a new request.

Render is used to make the content and it only works when the controller is being set up with the variables that require rendering.

It is a template that produces JavaScript. This javaScript then runs in an eval block in response to an AJAX request. Sometimes, this template is also used to define JavaScript, Prototype and helpers offered by Rails.

A call to super() initiates the parent method without any disputes.

A call to super initiates the parent method with the same disputes that were passed to the child. An error will occur if the arguments passed to the child do not match with the parent method.

Float is used when the function changes constantly.

Dig is used when you want to show a float in decimal digits.

Max is used when there is a need of Float.

Mainly four types of variables are available in Ruby Class - local variables, global variables, class variables and instance variables.

Ruby

• There are options for carrying out an action.
• It a reflective and object-oriented programming language.
• Used for functional programming.
• Frequent updates.

Python

• There is one specific way to carry out an action.
• It is a high-level and general purpose language.
• Used for scientific programming.
• Fewer updates.