Ruby Programming Language Quiz

Rails Controllers

• In a Rails controller, defining options keys can be done in a memory-efficient way by using options.merge instead of redefining the entire options hash.

Options Method

• The options method in a Rails controller class returns a hash of default options for the controller actions.

Hash Methods

• y.keys returns an array of the hash keys, while y.values returns an array of the hash values.

Rails Conventions

• Database tables in Rails follow the naming convention of being plural and in lowercase (e.g., users, articles).
• Models in Rails follow the naming convention of being singular and capitalized (e.g., User, Article).
• Classes and modules in Rails follow the naming convention of being capitalized (e.g., MyClass, MyModule).

Rails ORM

• The purpose of Object-Relational Mapping (ORM) in Rails is to interact with the database using objects, rather than writing raw SQL code.

Rails Controller

• The purpose of a Rails controller is to coordinate the interaction between the user, the views, and the models.

Rakefile

• The purpose of a Rakefile in Ruby is to define tasks that can be executed from the command line.

Ruby Variables

• A class variable in Ruby is shared by all instances of a class, while an instance variable is unique to each instance.

Ruby Access Modifiers

• Public access modifiers in Ruby make methods publicly accessible.
• Private access modifiers in Ruby make methods accessible only within the same class.
• Protected access modifiers in Ruby make methods accessible within the same class and its subclasses.

Rails Data Types

• The string data type in Rails is used for short strings, while the text data type is used for longer strings.

Ruby Loading

• The require method in Ruby is used to load libraries, while the load method is used to load Ruby code files.

Rails Active Record

• The purpose of Rails Active Record is to provide an interface to the database, allowing Ruby objects to be mapped to database tables.

Rails Migration

• A Rails migration is a way to modify the database schema, allowing incremental changes to the database.

CSRF Protection

• Rails protects against Cross-Site Request Forgery (CSRF) by generating and verifying a token for each request.

Ruby Garbage Collection

• The role of garbage collection in Ruby on Rails is to automatically manage memory allocation and deallocation.

Rails Migration Command

• The command to create a migration in Rails is rails generate migration.

Rails Scaffolding

• Dynamic scaffolding in Rails generates code at runtime, while static scaffolding generates code at development time.

Rails Parameters

• Strong parameters in Rails ensure that only permitted parameters are assigned to the model.

Ruby Inheritance

• Ruby supports single inheritance, where a class can inherit from only one parent class.

Ruby on Rails Limitations

• Some limitations of Ruby on Rails include performance issues with large applications and complexity in handling complex business logic.

Ruby Conversions

• Converting user-supplied arguments to symbols in Ruby can lead to a denial-of-service vulnerability due to the creation of large symbol tables.