Rails Interview Questions For Freshers

How do you define a route in Rails?

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Explain the concept of scaffolding in Rails.

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What is the role of the app/helpers folder in a Rails project?

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What is the purpose of the 'params' hash in Rails controllers?

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How do you create a new database table using Rails migrations?

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What is the purpose of the 'has_many' association in Rails?

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How do you generate a new model in Rails?

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What are the different types of associations in Rails ActiveRecord?

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Explain the concept of RESTful routing in Rails.

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What is the purpose of the 'yield' keyword in Rails views?

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What is the purpose of the 'link_to' method in Rails views?

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What is a migration in Rails?

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What is a controller in Rails?

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What is a model in Rails?

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Explain the concept of 'convention over configuration' in Rails.

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What is the purpose of the app/controllers folder in a Rails project?

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What is the role of the app/views folder in a Rails project?

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How do you create a new Rails application?

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What is the purpose of the Gemfile in a Rails project?

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How would you install Rails on your computer?

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What is the purpose of the 'redirect_to' method in Rails controllers?

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What is the purpose of the 'find' method in Rails ActiveRecord?

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Explain the concept of nested resources in Rails routes.

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What is the role of the config/routes.rb file in a Rails project?

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What is the purpose of the 'link_to' method in Rails views?

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How do you define a callback in a Rails model?

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What is the purpose of the 'form_tag' method in Rails views?

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Explain the concept of partials in Rails views.

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What is the purpose of the 'belongs_to' association in Rails?

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How do you define a scope in a Rails model?

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What is Ruby on Rails?

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Explain the concept of asset pipeline in Rails.

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What is the role of the app/models folder in a Rails project?

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What is the purpose of the 'render' method in Rails controllers?

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How do you define a before_action in a Rails controller?

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What is the purpose of the 'form_for' method in Rails views?

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What is the role of the app/assets folder in a Rails project?

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Explain the concept of inheritance in Rails controllers.

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What is the purpose of the 'attr_accessor' method in Rails models?

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How do you retrieve all records from a database table in Rails?

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Rails Intermediate Interview Questions

What is the purpose of the 'limit' method in Rails ActiveRecord queries?

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Explain the concept of jobs and workers in Rails.

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What is the purpose of the 'counter_cache' option in a Rails association?

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How do you perform a left outer join in Rails ActiveRecord?

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What is the purpose of the 'ransack' gem in Rails?

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Explain the concept of the 'flash' in Rails.

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How do you create a one-to-one association in Rails ActiveRecord?

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What is the purpose of the 'validates_uniqueness_of' validation in Rails?

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Explain the concept of routing constraints in Rails.

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What is the purpose of the 'private' keyword in a Rails controller?

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How do you generate a new controller in Rails?

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What is the purpose of the 'depends_on' keyword in a Rails migration?

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Explain the concept of AJAX in Rails.

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How do you validate the presence of a field in a Rails model?

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What is the purpose of the 'belongs_to :through' association in Rails?

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What is the purpose of the 'SQL' query method in Rails ActiveRecord?

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Explain the concept of eager loading in Rails ActiveRecord.

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How do you create a nested form in Rails?

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What is the purpose of the 'has_many :through' association in Rails?

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What is the purpose of a view helper in Rails?

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Explain the difference between 'render' and 'redirect_to' in Rails controllers.

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How do you create a migration that adds a column to an existing database table in Rails?

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How do you set a default value for a column in a Rails migration?

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Rails Interview Questions For Experienced

How do you perform a full-text search in Rails?

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How do you perform a raw SQL query in Rails ActiveRecord?

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What is the purpose of the 'delegate' method in Rails models?

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Explain the concept of the 'ActiveStorage' module in Rails.

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How do you add an index to a database table in a Rails migration?

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What is the purpose of the 'has_secure_password' method in a Rails model?

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Explain the concept of the 'spring' gem in Rails projects.

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How do you create a custom validation in a Rails model?

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What is the purpose of the 'ActiveJob' module in Rails?

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Explain the concept of the 'inverse_of' option in Rails associations.

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What is the purpose of the 'decorators' pattern in Rails?

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Explain the concept of caching in Rails.

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How do you create a many-to-many association in Rails ActiveRecord?

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What is the purpose of the 'has_and_belongs_to_many' association in Rails?

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Explain the concept of memoization in Rails.

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How do you perform a self-join in Rails ActiveRecord?

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What is the purpose of the 'params.require' method in Rails controllers?

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Explain the concept of the 'gemfile.lock' file in Rails projects.

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