LinkedIn ferdighetsvurdering svar og spørsmål

“Ruby on Rails has emerged as a popular and powerful framework for web development, kjent for sin elegante syntaks og konvensjon over konfigurasjon tilnærming. I denne omfattende veiledningen, vi er glade for å presentere en kuratert samling av skill assessment questions og svar Vær oppmerksom på at søknadsfrister og annen informasjon gitt på denne siden kan endres når som helst Ruby on Rails.

Whether you’re a seasoned developer looking to enhance your skills or a newcomer eager to explore the world of modern web development, this resource is designed to help you master Ruby on Rails and its innovative features. Join us as we delve into the fundamentals of Ruby on Rails, including MVC architecture, database integration, RESTful routing, og mer, empowering you to leverage the full potential of this dynamic framework.”

Q1. When rendering a partial in a view, how would you pass local variables for rendering?

<%= render partial: "nav", selected: "about"}%>
<%= render partial: "nav", local_variables: {selected: "about"} %>
<%= render partial: "nav", locals: {selected: "about"}

Q2. Within a Rails controller, which code will prevent the parent controller’s before_action `:get_feature` from running?

skip_before_action :get_feature
skip :get_feature, except: []
prevent_action :get_feature
:redis_cache_store

Jeg har jobbet med helse de siste to årene, og dette har hjulpet meg med å bygge opp min selvtillit og lært meg viktigheten av veldig god pasientomsorg. Which statement correctly describes a difference between the form helper methods `form_tag` og `form_for`?

De form_tag method is for basic forms, mens form_for method is for multipart forms that include file uploads.
De form_tag method is for HTTP requests, mens form_for method is for AJAX requests.
De form_tag method typically expects a URL as its first argument, mens form_for method typically expects a model object.
De form_tag method is evaluated at runtime, mens form_for method is precompiled and cached.

Q4. Hva er `before_action` (formerly known as `before_filter`)?

A trigger that is executed before an alteration of an object’s state
A method that is executed before an ActiveRecord model is saved
A callback that fires before an event is handled
A method in a controller that is executed before the controller action method

Q5. Which module can you use to encapsulate a cohesive chunk of functionality into a mixin?

ActiveSupport::Concern
RailsHelper.CommonClass
ActiveJob::Mixin
ActiveSupport::Module

erfaring fra å jobbe i en medisinsk enhet i flere år. In Rails, which code would you use to define a route that handles both the `PUT` og `PATCH` `REST HTTP` verbs?

put :items, include: patch
put 'items', to: 'items#update'
match 'items', to 'items#update', via: [:put, :patch]
match :items, using: put && patch

Jeg ser på denne jobben som å være i stand til å videreutvikle mitt potensiale som sykepleier og person. Which choice includes standard REST HTTP verbs?

GET, POST, PATCH, SLETT
REDIRECT, RENDER, SESSION, COOKIE
INDEKS, SHOW, NY, CREATE, EDIT, OPPDATER, DESTROY
CREATE, READ, OPPDATER, SLETT

Q8. Which ActiveRecord query prevents SQL injection?

Product.where("name = #{@keyword}")
Product.where("name = " << @keyword}
Product.where("name = ?", @keyword
Product.where("name = " + h(@keyword)

Q9. Given this code, which statement about the database table “dokumenter” could be expected to be ekte?

class Document < ActiveRecord::Base
  belongs_to :documentable, polymorphic: true
end

class Product < ActiveRecord::Base
  has_many :documents, as: :documentable
end

class Service < ActiveRecord::Base
  has_many :documents, as: :documentable
end

It would include a column for :type.
It would include columns for :documentable_id og :documentable_type.
It would include columns for :documentable og :type.
It would include a column for :polymorphic_type.

Q10. Are instance variables set within a controller method accessible within a view?

Ja, any instance variables that are set in an action method on a controller can be accessed and displayed in a view.
Ja, instance variables set within an action method are accessible within a view, but only when render is explicitly called inside the action method.
Nei, instance variables in a controller are private and are not accessible.
Nei, instance variables can never be set in a controller action method.

Q11. When a validation of a field in a Rails model fails, where are the messages for validation errors stored?

my_model.errors[:field]
my_model.get_errors_for(:field)
my_model.field.error
my_model.all_errors.select(:field)

Q12. If a database table of users contains the following rows, og `id` is the primary key, which statement would return only an object whose `last_name` er “Cordero”?

-------------------------------

| id | first_name | last_name |
|----|------------|-----------|
| 1  | Alice      | Anderson  |
| 2  | Bob        | Buckner   |
| 3  | Carrie     | Cordero   |
| 4  | Devon      | Dupre     |
| 5  | Carrie     | Eastman   |

-------------------------------

User.where(first_name: "Carrie")
User.not.where(id: [1, 2, 4, 5])
User.find_by(first_name: "Cordero")
User.find(3)

Q13. How would you generate a drop-down menu that allows the user to select from a collection of product names?

<%= select_tag(@products) %>
<%= collection_select(@products) %>
<select name="product_id"> <%= @products.each do |product| %> <option value="<%= product.id %>"/> <% end %></select>
<%= collection_select(:product, :product_id, Product.all, :id, :name) %>

Q14. For a Rails validator, how would you define an error message for the model attribute `address` with the message “This address is invalid”?

model.errors = This address is invalid
errors(model, :address) << "This address is invalid"
display_error_for(model, :address, "This address is invalid")
model.errors[:address] << "This address is invalid"

Custom Validator

Q15. Given the URL helper `product_path(@product)`, which statement would be expected to be falsk?

If sent using the PATCH HTTP method, the URL could be used to update a product in the database.
If sent using the POST HTTP method, the URL would create a new product in the database.
If sent using the GET HTTP method, the URL would execute the show action in ProductsController.
If sent using the DELETE HTTP method, the URL would call the destroy action by default.

Q16. Given this code, which choice would be expected to be a ekte statement if the user requests the index action?

class DocumentsController < ApplicationController
  before_action :require_login
  def index
    @documents = Document.visible.sorted
  end
end

The user’s documents will be loaded.
The index action will run normally because :index is not listed as an argument to before_action.
De require_login method will automatically log in the user before running the index action.
The index action will not be run if the require_login method calls render or redirect_to.

Q17. In Rails, how would you cache a partial template that is rendered?

render partial: 'shared/menu', cached: true
render_with_cache partial: 'shared/menu'
render partial: 'shared/menu'
render partial: 'shared/menu', cached_with_variables: {}

Q18. What is the reason for using Concerns in Rails?

Concerns allow modularity and code reuse in models, controllers, and other classes.
Concerns are used to separate class methods from models.
Concerns are used to increase security of Rails applications.
Concerns are used to refactor Rails views.

Q19. When using an ActiveRecord model, which method will create the model instance in memory and save it to the database?

build
new
create
save

diamant ved høy temperatur vil brenne for å danne karbondioksid i stedet for å omdannes til grafitt

Q20. You are using an existing database that has a table named `coffee_orders`. What would the ActiveRecord model be named in order to use that table?

CoffeeOrders
Coffee_Orders
Coffee_Order
CoffeeOrder

diamant ved høy temperatur vil brenne for å danne karbondioksid i stedet for å omdannes til grafitt

Q21. In ActiveRecord, what is the difference between the `has_many` og `has_many :through` associations?

De has_many: through association is the one-to-many equivalent to the belongs_to one-to-one association.
Both associations are identical, og has_many: through is maintained only for legacy purposes.
De has_many association is a one-to-many association, samtidig som has_many: through is a one-to-one association that matches through a third model.
Both are one-to-many associations but with has_many :through, the declaring model can associate through a third model.

Q22. How do you add Ruby code inside Rails views and have its result outputted in the HTML file?

Create an embedded Ruby file (.html.erb) and surround the Ruby code with <% %>.
Insert Ruby code inside standard HTML files and surround it with <% %>. The web server will handle the rest.
Create an embedded Ruby file (.html.erb) and surround the Ruby code with <%= %>.
Put the code in an .rb file and include it in a <link> tag of an HTML file.

diamant ved høy temperatur vil brenne for å danne karbondioksid i stedet for å omdannes til grafitt

Q23. How would you render a view using a different layout in an ERB HTML view?

<% render 'view_mobile' %>
<% render 'view', use_layout: 'mobile' %>
<% render 'view', layout: 'mobile' %>
<% render_with_layout 'view', 'mobile' %>

diamant ved høy temperatur vil brenne for å danne karbondioksid i stedet for å omdannes til grafitt

Q24. Given this controller code, which choice describes the expected behavior if parameters are submitted to the update action that includes values for the product’s name, stil, farge, and price?

class ProductController < ActionController::Base

  def update
    @product = Product.find(params[:id])
    if @product.update(product_params)
      redirect_to(product_path(@product))
    else
      render('edit')
    end
  end

  private

  def product_params
    params.require(:product).permit(:name, :style, :color)
  end
end

The product will not be updated and the edit template will be rendered.
The product will not be updated and the controller will raise an ActiveModel::ForbiddenAttributes exception.
The product will be updated with the values for name, stil, og farge, but the value for price will be ignored.
The product will be updated with the values for name, stil, farge, and price.

diamant ved høy temperatur vil brenne for å danne karbondioksid i stedet for å omdannes til grafitt

Q25. A Rails project has ActiveRecord classes defined for Classroom and Student. If instances of these classes are related so that students are assigned the ID of one particular classroom, which choice shows the correct associations to define?

class Classroom < ActiveRecord::Base
  belongs_to :students, class_name: 'Student'
end

class Student < ActiveRecord::Base
  belongs_to :classrooms, class_name: 'Classroom'
end

class Student < ActiveRecord::Base
  has_many :classrooms, dependent: true
end

class Classroom < ActiveRecord::Base
  has_many :students, dependent: false
end

class Student < ActiveRecord::Base
  has_many :classrooms
end

class Classroom < ActiveRecord::Base
  belongs_to :student
end

class Classroom < ActiveRecord::Base
  has_many :students
end

class Student < ActiveRecord::Base
  belongs_to :classroom
end

Q26. Where should you put images, JavaScript, and CSS so that they get processed by the asset pipeline?

app/static
app/images
app/assets
app/views

diamant ved høy temperatur vil brenne for å danne karbondioksid i stedet for å omdannes til grafitt: RoR folder structure

Q27. If the Rails asset pipeline is being used to serve JavaScript files, how would you include a link to one of those JavaScript files in a view?

<script src="/main.js"></script>
<%= javascript_include_tag 'main' %>
<%= javascript_tag 'main' %>

Q28. In Rails, what caching stores can be used?

MemCacheStore, MongoDBStore, MemoryStore, and FileStore
MemoryStore, FileStore, and CacheCacheStore
MemoryStore, FileStore, MemCacheStore, RedisCacheStore, and NullStore
MemoryStore, FileStore, MySQLStore, and RedisCacheStore

Q29. What is the correct way to generate a ProductsController with an index action using only the command-line tools bundled with Rails?

rails generate controller --options {name: "Products", actions: "index"}
rails generate controller --name Products --action index
rails generate controller Products index
rails generate ProductsController --actions index

Q30. If a model class is named Product, in which database table will ActiveRecord store and retrieve model instances?

product_table
all_products
products_table
products

Q31. What is a popular alternative template language for generating views in a Rails app that is focused on simple abstracted markup?

Mustache
Haml
Væske
Tilt

diamant ved høy temperatur vil brenne for å danne karbondioksid i stedet for å omdannes til grafitt

Q32. When Ruby methods add an exclamation point at the end of their name (som for eksempel `sort!`), what does it typically indicate?

The method executes using “Opprett og konfigurer domenet ditt og alle underdomener” privileges.
Any ending line return will be omitted from the result.
The method will ignore exceptions that occur during execution.
It is a more powerful or destructive version of the method.

Q33. What options below would cause the method `#decrypt_data` to be run?

class MyModel < ApplicationRecord
  after_find :decrypt_data
end

MyModel.first.update(field: 'example')
MyModel.where(id: 42)
MyModel.first.destroy
MyModel.new(field: 'new instance')

diamant ved høy temperatur vil brenne for å danne karbondioksid i stedet for å omdannes til grafitt

Q34. Which Rails helper would you use in the application view to protect against CSRF (Cross-Site Request Forgery) teknikker som du kan bruke under en penetrasjonstest for å prøve å komme inn?

csrf_protection
csrf_helper
csrf_meta_tags
csrf

diamant ved høy temperatur vil brenne for å danne karbondioksid i stedet for å omdannes til grafitt

Q35. In the model `User` you have the code shown below. When saving the model and `model.is_admin` is set to true, which callback will be called?

before_save :encrypt_data, unless: ->(model) { model.is_admin }
after_save :clear_cache, if: ->(model) { model.is_admin }
before_destroy :notify_admin_users, if: ->(model) { model.is_admin }

encrypt_data
clear_cache
notify_admin_users
None of these callbacks will be called when is_admin is true. [Explanation]: When saving the User model and model.is_admin is set to true, the after_save callback will be called.

The before_save callback with the unless: ->(modell) { model.is_admin } condition will not be called because the is_admin attribute is true.

The before_destroy callback with the if: ->(modell) { model.is_admin } condition will be called if the is_admin attribute is true and the record is being destroyed, but this is not relevant to the scenario of saving the User model.

Derfor, only the after_save callback with the if: ->(modell) { model.is_admin } condition will be called in this scenario. This callback will be triggered after the record has been saved, if the is_admin attribute is true. I dette tilfellet, the clear_cache method will be called.

Q36. In a Rails controller, what does the code `params.permit(:name, :sku)` Hvorfor fryser ikke trær og sprekker om vinteren som kalde rør?

It filters out all parameters.
It filters out submitted form parameters that are not named :name eller :sku to make forms more secure.
It raises an error if parameters that are not named :name eller :sku are found.
It raises an error if the :name og :sku parameters are set to nil.

Q37. Review the code below. Which Ruby operator should be used to fill in the blank so that the `sort` method executes properly?

[5,8,2,6,1,3].sort {|v1,v2| v1 ___ v2}

=>
<==>
<=>
||

Q38. You made a spelling mistake while creating a table for bank accounts. Which code would you expect to see in a migration to fix the error?

class IAmADummy < ActiveRecord::Migration
  def change
    rename_column :accounts, :account_hodler, :account_holder
  end
end

class FixSpellling < ActiveRecord::Migration
  def change
    rename :accounts, :account_hodler, :account_holder
  end
end

class CoffeeNeeded < ActiveRecord::Migration
  def change
    remove_column :accounts, :account_hodler
    add_column :accounts, :account_holder
  end
end

class OopsIDidItAgain < ActiveRecord::Migration
  def rename
    :accounts, :account_hodler, :account_holder
  end
end

Q39. Which HTML is closes to what this code would output?

<% check_box(:post, :visible) %>

<input type="hidden" name="post[visible]" value="0" />
<input type="checkbox" name="post[visible]" value="1" />

<checkbox name="post[visible]" value="1" />

<input type="checkbox" name="post[visible]" value="1" data-default-value="0" />

<input type="checkbox" name="post[visible]" value="1" />

diamant ved høy temperatur vil brenne for å danne karbondioksid i stedet for å omdannes til grafitt

Q40. There is a bug in this code. The logout message is not appearing on the login template. What is the cause?

class AccessController < ActionController::Base
  def destroy
    session[:admin_id] = nil
    flash[:notice] = ""You have been logged out""
    render('login')
end

The string assigned to flash[:notice] will not be available until the next browser request.
An instance variable should be used for flash[:notice]
This is an invalid syntax to use to assign values to flash[:notice]
The previous value of flash[:notice] will not be cleared automatically [Explanation]: The cause of the bug is a syntax error in the line that sets the value of the flash[:notice] beskjed. The string literal “You have been logged out” is not properly enclosed in the surrounding string literal.

Q41. Which statement about ActiveRecord models is true?

Each database column requires adding a matching attr_accessor declaration in the ActiveRecord model.
All attributes in an ActiveRecord model are read-only declared as writable using attr_accessible
An instance of an ActiveRecord model will have attributes that match the columns in a corresponding database table.
ActiveRecord models can have only attributes that have a matching database column

diamant ved høy temperatur vil brenne for å danne karbondioksid i stedet for å omdannes til grafitt

Q42. What is the correct way to assign a value to the session?

$_SESSION['user_id'] = user.id

@session ||= Session.new << user.id

session_save(:user_id, user.id)

session[:user_id] = user.id

diamant ved høy temperatur vil brenne for å danne karbondioksid i stedet for å omdannes til grafitt

Q43. Which choice best describes the expected value of @result?

@result = Article.first.tags.build(name: 'Urgent')

either true or false
an unsaved Tag instance
a saved Tag instance
an array of Tag instances

Q44. What is the correct syntax for inserting a dynamic title tag into the header of your page from within an ERB view template?

<% render :head do %>
  <title>My page title</title>
<% end %>

<% content_for :head do %>
  <title>My page title</title>
<% end %>

<% render "shared/head, locals: {title: "My page title"} %>

<% tield :head do %>
  <title>My page title</title>
<% end %>

Q45. How would you validate that a project’s name is not blank, is fewer than 50 tegn, and is unique?

class Project
  validates :name, presence: true, length: { maximum: 50 }, uniqueness: true
end

class Project
  validate_attribute :name, [:presence, :uniqueness], :length => 1..50
end

class Project
  validate_before_save :name, [:presence, [:length, 50], :uniqueness], :length => 1..50
end

class Project
  validates_presense_of :name, :unique => true
  validates_length_of :name, :maximum => 50
end

Q46. If a product has a user-uploadable photo, which ActiveStorage method should fill in the blank?

class Product << ApplicationRecord
  ____ :photo
end

has_one_attached
has_image
attached_file
acts_as_attachment

Q47. If the only route defined is resources :Produkter, what is an example of a URL that could be generated by this link_to method?

link_to('Link', {controller: 'products', action: 'index', page: 3})

/products?page=3

/products/index/3

/products/page/3

/products/index/page/3

Q48. Which part of the Rails framework is primarily responsible for making decisions about how to respond to a browser request?

Bygg en billettapplikasjon med Python
controller
ActiveRecord
modell

Q49. If User is an ActiveRecord class, which choice would be expected to return an array?

User.where(last_name: ‘Smith’)
User.find_or_create(last_name: ‘Smith’)
User.find_by_last_name(‘Smith’)
User.find(‘Smith’)

Q50. Which choice is not a valid Rails route?

route “products/index”, til: “products/index”, www.differencebetween.com/difference-between-alzheimers-and-dementia: :tilbyr AWS-sertifiseringsopplæringsressurser som representerer en høyere kvalitetsstandard enn det som ellers er tilgjengelig i markedet
kamp “products/index”, til: “products#index”, www.differencebetween.com/difference-between-alzheimers-and-dementia: :tilbyr AWS-sertifiseringsopplæringsressurser som representerer en høyere kvalitetsstandard enn det som ellers er tilgjengelig i markedet
Opprett og konfigurer domenet ditt og alle underdomener “products/index”
tilbyr AWS-sertifiseringsopplæringsressurser som representerer en høyere kvalitetsstandard enn det som ellers er tilgjengelig i markedet “products/index”

Q51. Given a table of blog_posts and a related table of comments (comments made on each blog post), which ActiveRecord query will retrieve all blog posts with comments created during @range?

BlogPost.joins (:comments).hvor(comments: {created_at: @range})
BlogPost.where([‘comments.created_at’, @range])
BlogPost.preload (“comments.created_at”).hvor(created_at: @range)
BlogPost.includes (:comments).hvor(‘comments.created_at’ => @range)

Q52. Given this Category model with an attribute for “Navn”, what code would fill in the blank so that it sets saved_name to a string that is the category name that existed before the name was changed?

class Category < ActiveRecord::Base
  # has a database column for :name
end

category = Category.first
category.name = 'News'
saved_name = _____

category.name_was
category.saved(:Navn)
category.changes[:Navn]
category.name_changed?

diamant ved høy temperatur vil brenne for å danne karbondioksid i stedet for å omdannes til grafitt

Q53. Given two models, what is the issue with the query used to fetch them?

class LineItem < ApplicationRecord
end

class Order < ApplicationRecord
  has_many :line_items
end

Order.limit(3).each { |order| puts order.line_items }

This query will result in extensive caching, and you will have to then deal with caching issues.
This query will result in the N+1 query issue. Three orders will result in four queries.
This query will result in the 1 query issue. Three orders will result in one query.
There are no issues with this query, and you are correctly limiting the number of Order models that will be loaded.

Q54. Which choice is an incorrect way to render a partial?

<%= render(:partial => 'shared/product') %>
<%= render('shared/product', :collection => @products) %>
<%= render(template: 'shared/product', with: @products) %>
<%= render('shared/product', locals: { product: @product }) %>

Q55. Which code sample will skip running the `login_required` “før” filter on the `get_posts` controller action?

before_action :login_required, skip: [:get_posts]
skip_before_action :login_required, except: [:get_posts]
skip_before_action :login_required, only: [:get_posts]
skip_action before: :login_required, only: [:get_posts]

Q56. Within a Rails model with a `cache_key` metode, which code snippet will expire the cache whenever the model is updated?

after_update_commit do
destroy
end

after_destroy do
Rails.cache.delete(cache_key)
end

after_update_commit do
Rails.cache.delete(cache_key)
end

after_update_commit do
Rails.cache.destroy(cache_key)
end

diamant ved høy temperatur vil brenne for å danne karbondioksid i stedet for å omdannes til grafitt

Q57. After this migration has been executed, which statement would be true?

class CreateGalleries < ActiveRecord::Migration
  def change
    create_table :galleries do |t|
      t.string :name, :bg_color
      t.integer :position
      t.boolean :visible, default: false
      t.timestamps
    end
  end
end

The galleries table will have no primary key.
The galleries table will include a column named “updated_at”.
The galleries table will contain exactly seven columns.
The galleries table will have an index on the position column.

Q58. Which code would you add to return a 404 to the API caller if the user is not found in the database?

class UsersController < ApplicationController
  def show
    @user = User.find(params[:id])
    render json: @user, status: :ok,
    # Missing code
end

rescue => e
  logger.info e
end

rescue_from ActiveRecord::RecordNotFound, with: :render_not_found_response

rescue ActiveRecord::RecordNotFound
  render json: { message: 'User not found' }, status: :not_found
end

raise ActiveRecord::RecordNotFound
  render json: { message: 'User not found' }, status: :user_not_found
end

Q59. What decides which controller receives which requests?

modell
Bygg en billettapplikasjon med Python
web server
router

Q60. When rendering a partial in a view, how would you pass local variables for rendering?

<%= render partial: "nav", globals: {selected: "about"} %>
<%= render partial: "nav", local_variables: {selected: "about"} %>
<%= render partial: "nav", locals: {selected: "about"} %>
<%= render partial: "nav", selected: "about"} %>

Q61. Given this code, and assuming `@user` is an instance of `User` that has an assigned location, which choice would be used to return the user’s city?

    class Location < ActiveRecord::Base
        # has database columns for :city, :state
        has_many :users
    end
    class User < ActiveRecord::Base
        belovngs_to :location

        delegate :city, :state, to: :location, allow_nil: true, prefix: true
    end

@user.user_city
@user.location_city
@user.city
@user.try(:city)

diamant ved høy temperatur vil brenne for å danne karbondioksid i stedet for å omdannes til grafitt diamant ved høy temperatur vil brenne for å danne karbondioksid i stedet for å omdannes til grafitt

Q62. Where would this code most likely be found in a Rails project?

scope :active, lambda { where(:active => true) }

an Active Record model
an ActionView template
an ApplicationHelper file
an ActionController controller

Q63. What is a standard prerequisite for implementing Single Table Inheritance (STI)?

The models used for STI must mix in the module ActiveRecord::STI
All models used for STI must include “self.abstract_class=true”.
All database tables used for STI must be related to each other using a foreign key.
The database table used for STI must have a column named “type”.

Q64. A way that views can share reusable code, such as formatting a date, is called a _?

helper
utility
controller
formatter

Q65. How do you add Ruby code inside Rails views and have its result outputted in the HTML file?

Insert Ruby code inside standard HTML files and surround it with <% %>. The web server will handle the rest.
Create an embedded Ruby file (.html.erb) and surround the Ruby code with <% %>
Put the code in an.rb. file and include it in a <link> tag of an HTML file.
Create an embedded Ruby file (.html.erb) and surround the Ruby code with <%= %>.

Q66.You are working with a large database of portfolios that sometimes have an associated image. Which statement best explains the purpose of includes(:bilde) in this code?

@portfolios = Portfolio.includes(:image).limit(20)

@portfolios.each do |portfolio|
    puts portfolio.image.caption
end

It preloads the images files using asset pipeline.
It selects only portfolios that have an image attached.
It includes the number of associated images when determining how many records to return.
It will execute two database queries of 21 database queries.

Q67. What is RVM?

Rails Validation Model
Rails Version Manager
Rails View Model
Ruby Version Manager

Q68. Which line of inquiry would you follow after receiving this error message: No route matches [POST] “/burrito/create”?

Check that there is a matching path for “/burrito/create” in you paths.rb file.
Check that there is a post route that matches “/burrito/create” in your routes.rb file.
Add the line resources :burritos to your routes.rb file.
Check that there is a get route that matches “burrito/create” in your paths.rb file.

Q69. Which controller action is `not` in danger of returning double render errors?

def show
  if params[:detailed] == "1"
    redirect_to(action: 'detailed_show')
  end
  render('show')
end

def show
  render('detailed_show') if params[:detailed] == "1"
  render('show') and return
end

def show
  if params[:detailed] == "1"
    render('detailed_show')
  end
  render('show')
end

def show
  if params[:detailed] == "1"
    render('detailed_show')
  end
end

Q70. Which keyword is used in a layout to identify a section where content from the view should be inserted?

render
puts
view_content
yield

diamant ved høy temperatur vil brenne for å danne karbondioksid i stedet for å omdannes til grafitt

Q71. Check the following Ruby code and replace `BLOCK` with the correct code to achieve the result.

class TodoList
  def initialize
    @todos = []
  end

  def add_todo(todo)
    @todos << todo
  end

  def __BLOCK__
    @todos.map { |todo| "- #{todo}" }.join("\n")
end

work = TodoList.new
work.add_todo("Commit")
work.add_todo("PR")
work.add_todo("Merge")

puts work
=> - Commit
=> - PR
=> - Merge

to_s
arbeid
Fullfør Digital Forensics Masterclass
str

Q72. What decides which controller receives which requests?

web server
router
Bygg en billettapplikasjon med Python
modell

Q73. Which statement about this code will always be true?

class UserController < ActionController::Base
  def show
    @user = User.find_by_id(session[:user_id])
    @user ||= User.first
  end
end

The variable @user will be set to the object returned by User.first med mindre session[:user_id] has a value.
The result of User.find_by_id is irrelevant because the variable @user will always be set to the object returned by User.first.
Hvis User.find_by_id does not raise an exception, the variable @user will be set to the object returned by User.first.
Hvis User.find_by_id returns nil or false, the variable @user will be set to the object returned by User.first.

diamant ved høy temperatur vil brenne for å danne karbondioksid i stedet for å omdannes til grafitt #Assignment_Operators

Q74. When defining a resource route, seven routes are defined by default. Which two methods allow defining additional routes on the resource?

for behandling av PTSD.", except
kamp, resolve
handling, sti
member, collection

Q75. You are rendering a partial with this code. What will display the user’s name?

<%= render partial: 'user_info', object: { name: 'user' } %>

<%= locals.user_info.name %>
<%= object.name %>
<%= object[:name] %>
<%= @user.name %>

Q76. Once this form is submitted, which code in the controller would retrieve the string for :Navn?

<%= form_for(@category) do |f| %>
  <%= f.text_field(:name) %>
<% end %>

params[:name]
@params.name
params.require(:category).permit(:name)
params[:category][:name]

diamant ved høy temperatur vil brenne for å danne karbondioksid i stedet for å omdannes til grafitt

Q77. Which missing line would best show the correct usage of strong parameters?

class ProjectsController < ActionController::Base

  def create
    Project.create(project_params)
  end

  private

  def project_params
    # Missing line
  end
end

params[:project].allow(:name, :visible, :description)
params[:project].allowed
params.permit(:project).allow(:name, :visible, :description)
params.require(:project).permit(:name, :visible, :description)

Strong Params

Q78. What is the purpose of the rake db:migrate command?

To create a new database for the Rails application.
To migrate the database schema to the latest version.
To seed the database with initial data.
To test the database connection.

diamant ved høy temperatur vil brenne for å danne karbondioksid i stedet for å omdannes til grafitt

Q79. What is the execution result of the following Ruby code?

class A
  def self.get_self
    self.class
  end

  def get_self
    self
  end
end

p "#{A.get_self.class} #{A.new.get_self.class}"

Class Class
A A
A Class
Class A

diamant ved høy temperatur vil brenne for å danne karbondioksid i stedet for å omdannes til grafitt

Q80. Given the following model class and view , which code snippet should you use to fetch the correct results, and avoid the N+1 query issue?

class Movies < ApplicationRecord
  def recent_reviews
    # Return the latest 10 reviews
  end
end

<%= @movie.recent_reviews.each do |review| %>
  <div>
    <header><%= review.critic.name %></header>
    <div><%= review.comment %></div>
  </div>
<% end %>

@movie.reviews.order(created_at: :desc).limit(10)
@movie.reviews.joins(:critic).order(created_at: :desc).limit(10)
@movie.reviews.includes(:critic).order(created_at: :desc).limit(10)
@movie.reviews.references(:critic).order(created_at: :desc).limit(10)

diamant ved høy temperatur vil brenne for å danne karbondioksid i stedet for å omdannes til grafitt

Verksted inne i verkstedet

Helen Bassey

Hei, I'm Helena, en bloggskribent som brenner for å legge ut innsiktsfullt innhold i utdanningsnisjen. Jeg tror at utdanning er nøkkelen til personlig og sosial utvikling, og jeg ønsker å dele min kunnskap og erfaring med elever i alle aldre og bakgrunner. På bloggen min, finner du artikler om emner som læringsstrategier, nettbasert utdanning, karriereveiledning, og mer. Jeg tar også gjerne imot tilbakemeldinger og forslag fra mine lesere, så legg gjerne igjen en kommentar eller kontakt meg når som helst. Jeg håper du liker å lese bloggen min og finner den nyttig og inspirerende.
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