Ruby on Rails Test

In the following code, the logout message will not appear on the login template because of a bug in the code. What is the bug?

class AccessController < ActionController::Base

  def destroy

  session[:admin_id] = nil

  flash[:notice] = "You have been logged out."

  render('login')

  end

end

An instance variable should be used for flash[:notice].

The string assigned to flash[:notice] will not be available until the next browser request.

The previous value of flash[:notice] will not be cleared automatically.

This is an invalid syntax to use to assign values to flash[:notice].

Option A

Option B

Option C

Option D

Which statement best explains the purpose of `includes(:address)` in the following code?
@portfolios = Portfolio.includes(:image).limit(20)

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

It enables the code to access the image instance related to each portfolio instance.

It joins the two tables into a single database query.

It will execute 2 database queries instead of 21 database queries.

It preloads the image files using asset pipeline.

Option A

Option B

Option C

Option D

What code could be used in a template to output "Ruby" in the response to the browser?

<= print "Ruby" >

<? echo "Ruby" ?>

<%= "Ruby" %>

<% puts "Ruby" %>

Option A

Option B

Option C

Option D

Where would the following code most likely be found in a Rails project? scope :active, lambda { where(:active => true) }

AN ACTIVERECORD MODEL

AN ACTIONVIEW TEMPLATE

AN APPLICATIONHELPER FILE

AN ACTIONCONTROLLER CONTROLLER

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

PREVENT_ACTION :GET_FEATURE

SKIP :GET_FEATURE, EXCEPT: []

:REDIS_CACHE_STORE

SKIP_BEFORE_ACTION :GET_FEATURE

Which statement correctly describes a difference between the form helper methods form_tag and form_for?

THE FORM_TAG METHOD IS FOR HTTP REQUESTS, WHILE THE FORM_FOR METHOD IS FOR AJAX REQUESTS.

THE FORM_TAG METHOD TYPICALLY EXPECTS A URL AS ITS FIRST ARGUMENT, WHILE THE FORM_FOR METHOD TYPICALLY EXPECTS A MODEL OBJECT.

THE FORM_TAG METHOD IS EVALUATED AT RUNTIME, WHILE THE FORM_FOR METHOD IS PRECOMPILED AND CACHED.

THE FORM_TAG METHOD IS FOR BASIC FORMS, WHILE THE FORM_FOR METHOD IS FOR MULTIPART FORMS THAT INCLUDE FILE UPLOADS.

What is 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

Which are standard REST HTTP verbs?

REDIRECT, RENDER, SESSION, COOKIE

INDEX, SHOW, NEW, CREATE, EDIT, UPDATE, DESTROY

CREATE, READ, UPDATE, DELETE

GET, POST, PATCH, DELETE

Q7. Which choice includes standard REST HTTP verbs?

GET, POST, PATCH, DELETE

REDIRECT, RENDER, SESSION, COOKIE

INDEX, SHOW, NEW, CREATE, EDIT, UPDATE, DESTROY

CREATE, READ, UPDATE, DELETE

Which ActiveRecord query prevents an SQL Injection?

PRODUCT.WHERE("NAME = ?", @KEYWORD)

PRODUCT.WHERE("NAME = #{@KEYWORD}")

PRODUCT.WHERE("NAME = " << @KEYWORD)

PRODUCT.WHERE("NAME = " + H(@KEYWORD))

Which example shows a type of variable that enables the rendered template to access its value?

USER

@@USER

TEMPLATE['USER']

@USER

Which of the following statements about migrations is FALSE?

MIGRATIONS ARE RUN AUTOMATICALLY EVERY TIME THE APPLICATION IS LAUNCHED.

MIGRATIONS SHOULD CONTAIN INSTRUCTIONS FOR BOTH MAKING AND UNMAKING CHANGES TO THE DATABASE.

MIGRATIONS ARE A SET OF DATABASE INSTRUCTIONS WRITTEN IN RUBY.

MIGRATIONS SHOULD CONTAIN INSTRUCTIONS FOR BOTH MAKING AND UNMAKING CHANGES TO THE DATABASE.

Which example below shows 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 }) %>

Which choice best describes the expected value of @result? @result = article.first.tags.build(name: ‘urgen’)

A SAVED TAG INSTANCE

AN UNSAVED TAG INSTANCE

AN ARRAY OF TAG INSTANCES

EITHER TRUE OR FALSE

The asset pipeline in Ruby on Rails helps manage JavaScript and CSS assets. Which choice is NOT a feature of asset pipeline?

ASSET PIPELINE CONCATENATES ASSETS TO REDUCE THE NUMBER OF REQUESTS A BROWSER MAKES.

ASSET PIPELINE PRECOMPILES ASSETS WRITTEN IN OTHER LANGUAGES.

ASSET PIPELINE SEND ASSETS TO THE BROWSER BEFORE THE HTML RESPONSE TO SPEED UP PAGE RENDERING.

ASSET PIPELINE USES MINIFICATION AND COMPRESSION TECHNIQUES TO MAKE ASSETS SMALLER.

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

VIEW

ACTIVERECORD

CONTROLLER

MODEL

Which statement best describes what the render method does?

IT SPECIFIES AN ARBITRARY TEMPLATE TO USE FOR OUTPUT.

IT SPECIFIES THE LAYOUT TO USE FOR A CONTROLLER.

IT REDIRECTS THE BROWSER TO A NEW URL.

IT SPECIFIES THE CONTROLLER TO USE FOR PROCESSING A REQUEST.

Which choice correctly describes a difference between the form helper methods form_tag and form_for?

THE FORM_TAG METHOD TYPICALLY EXPECTS A URL AS ITS FIRST ARGUMENT WHILE THE FORM_FOR METHOD TYPICALLY EXPECTS A MODEL OBJECT.

THE FORM_TAG METHOD IS FOR BASIC FORMS WHILE THE FORM_FOR METHOD IS FOR MULTI-PART FORMS WHICH INCLUDE FILE UPLOADS.

THE FORM_TAG METHOD IS FOR HTTP REQUESTS WHILE THE FORM_FOR METHOD IS FOR AJAX REQUESTS.

THE FORM_TAG METHOD IS EVALUATED AT RUN-TIME WHILE THE FORM_FOR METHOD IS PRECOMPILED AND CACHED.

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

YIELD

RENDER

PUTS

CONTENT_FOR

Which is NOT a valid Rails route?

MATCH "PRODUCTS/INDEX", TO: "PRODUCTS#INDEX", VIA: :GET

GET "PRODUCTS/INDEX"

ROOT "PRODUCTS/INDEX"

ROUTE "PRODUCTS/INDEX", TO: "PRODUCTS/INDEX", VIA: :GET

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?

<%= JAVASCRIPT_TAG ‘MAIN’ %>

<%= JAVASCRIPT_INCLUDE_TAG ‘MAIN’ %>

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

RENDER PARTIAL: ‘SHARED/MENU’

RENDER_WITH_CACHE PARTIAL: ‘SHARED/MENU’

RENDER PARTIAL: ‘SHARED/MENU’, CACHED: TRUE

RENDER PARTIAL: ‘SHARED/MENU’, CACHED_WITH_VARIABLES: {}

Which statement is TRUE?

ALL ATTRIBUTES IN AN ACTIVERECORD MODEL ARE READ-ONLY UNLESS DECLARED AS WRITABLE USING ATTR_ACCESSIBLE.

EACH DATABASE COLUMN REQUIRES ADDING A MATCHING ATTR_ACCESSOR DECLARATION IN THE ACTIVERECORD MODEL.

AN INSTANCE OF AN ACTIVERECORD MODEL WILL HAVE ATTRIBUTES THAT MATCH THE COLUMNS IN A CORRESPONDING DATABASE TABLE.

ACTIVERECORD MODELS CAN ONLY HAVE ATTRIBUTES WHICH HAVE A MATCHING DATABASE COLUMN.

Which of the following choices shows the correct way to assign a value to the session?

@SESSION ||= SESSION.NEW << USER.ID

SESSION_SAVE(:USER_ID, USER.ID)

$_SESSION['USER_ID'] = USER.ID

SESSION[:USER_ID] = USER.ID

Which technique would NOT be useful to share common attributes and behaviors between two ActiveRecord models?

SINGLE TABLE INHERITANCE

A POLYMORPHIC ASSOCIATION

A RUBY MODULE AS A MIXIN

A RAILS CONCERN

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

ALL MODELS USED FOR STI MUST INCLUDE "SELF.ABSTRACT_CLASS = TRUE"

THE MODELS USED FOR STI MUST MIXIN THE MODULE ACTIVERECORD::STI.

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".

Previous versions of Ruby on Rails required developers to explicitly call ERB's html_escape method on strings to make them safe for use in templates. Current versions escape all strings by default. Which command tells a template NOT to escape a string?

HTML_UNESCAPE

RAW

SAFE

HUMANIZE

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Exam Type:	Ruby on Rails MCQ Skill Test
Questions Type:	Multiple Choice Questions
Total Questions:	27
Time Limit:	30 Minutes
Last Update	July, 2025

Pass Ruby on Rails Exam

Ruby On Rails Quiz

What code could be used in a template to output "Ruby" in the response to the browser?

<= print "Ruby" >

<? echo "Ruby" ?>

<%= "Ruby" %>

<% puts "Ruby" %>

Where would the following code most likely be found in a Rails project? scope :active, lambda { where(:active => true) }

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

Which statement correctly describes a difference between the form helper methods form_tag and form_for?

What is before_action (formerly known as before_filter)?

Which are standard REST HTTP verbs?

Q7. Which choice includes standard REST HTTP verbs?

Which ActiveRecord query prevents an SQL Injection?

Which example shows a type of variable that enables the rendered template to access its value?

Which of the following statements about migrations is FALSE?

Which example below shows an INCORRECT way to render a partial?

Which choice best describes the expected value of @result? @result = article.first.tags.build(name: ‘urgen’)

The asset pipeline in Ruby on Rails helps manage JavaScript and CSS assets. Which choice is NOT a feature of asset pipeline?

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

Which statement best describes what the render method does?

Which choice correctly describes a difference between the form helper methods form_tag and form_for?

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

Which is NOT a valid Rails route?

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?

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

Which statement is TRUE?

Which of the following choices shows the correct way to assign a value to the session?

Which technique would NOT be useful to share common attributes and behaviors between two ActiveRecord models?

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

Previous versions of Ruby on Rails required developers to explicitly call ERB's html_escape method on strings to make them safe for use in templates. Current versions escape all strings by default. Which command tells a template NOT to escape a string?