D2L Quizzes

The answer is marked with * after the quiz closes. 

Quiz 1
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1. When positioning section delimited by <div> tags, for which value of the CSS 
   property position will the left and right properties have no effect?
   a. absolute   b. fixed   c. relative   *d. static

2. What does the ERB statement <%= yield %> do?
   a. It displays the contents of a database table on a view.
   b. It displays the contents of a database table on a layout page.
  *c. It embeds a view in a layout page.
   d. It hides a view that should not be displayed.
   
Quiz 2
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1. Which validation is correct to insure that gpa is a number?
   a. validates gpa, numericality = true
   b. validates :gpa, :numericality = true  
  *c. validates :gpa, numericality: true
   d. validates gpa, { numericality => true }
 
2. If Doctor is a Rails model, where would the line
   @doctors = Doctor.all 
   most likely be placed?  In a  
   *a. controller   b. layout page    c. stylesheet    d. view.
 
Quiz 3
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1. Which of the following Ruby method calls returns an object that 
   contains the current time and date?
   a. CurrentDateTime.new   b. DateTime.new    c. DateTime.now    *d. Time.now
 
2. Which of these creates all of the routes for a scaffold-based controller 
   where the model is named Owner in the config/routes.rb file?
   a. resources Owner    *b. resources :owners    c. routes Owner   d. routes :owners
 
Quiz 4
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1. When sending a web page back to the server, which of the following HTTP 
   methods requires the data to be embedded in the URL? 
   *a. GET        b. POST        c. PUT        d. RETURN
   
2. Which of these model validation statements insures that the count is 
   a positive integer with no leading zeros?
   a. validates :count, format: {:with: /d+/ }
   b. validates :count, format: {:with: /d*/ }
   c. validates :count, format: {:with: /[1-9]?/ }  
  *d. validates :count, format: {:with: /[1-9]\d*/ }
  
Quiz 5
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1. What are the possible return values of the spaceship operator <=>?
   a. 0 and 1   *b. -1, 0, and 1    c. true and false    d. true, false, and nil
 
2. Which method is used in a Rails model file to set up a many-to-many relationship?
   a. belongs_to_and_has_many    *b. has_and_belongs_to_many
   b. many_to_many                d. has_many_through
 
Quiz 6
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1. Which ActiveRecord method is used to sort the rows from a database table?
   a. collate     *b. order       c.reorder       d. sort
 
2. Which Ruby method do you call in the config/routes.rb file to 
   designate the view that is obtained with the URL
   http://localhost:3000/
   a. default      b. home       c. index       *d.root
   
Quiz 7
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1. What can you enter in a the CommandPrompt or Terminal Window to obtain all of 
   the routes that are defined for a Rails project?
   a. rails paths     b. rails routes    c. rake paths    d. rake routes
 
2. What is another name for a Cryptographic hash?
   a. array    b. digest     c. password     d.session
 
Quiz 8
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1. Which jQuery statement sets the src attribute of the image with id="animal" to dog.jpg?
   a. $("animal").src("dog")            b. $("#animal").attr("src", "dog")
   b. $("img").css("src", "dog.jpg")    d. $(img#animal).css("src", "dog.jpg")
 
2. Which language is a simpler alternative to jQuery?
   a. CoffeeScript     b. JavaScript     c.Python     d. Sinatra