Test your basic knowledge |

Ruby On Rails Basics

Subject : it-skills

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. express error messages in a form (do |f|)
f.error_messages
include modulename
Embedded Ruby (ERb)
Embedded Ruby (ERb)

2. A search form is not associated with a ______
puts ?x where x is the character (not variable)
model
errors.add_to_base("there was an error")
nested classes

3. Long form of "rake" which can do more complex things like modifying the database structure and running testsis
underscore
#{1+1}
ruby make
an object-relational mapping library

4. to check if an input is numeric
put a $ sign in front. For example $x
ruby make
helper method
validates_numericality_of

5. A special class whose only job is to have attributes and to hold data
Structs
Embedded Ruby (ERb)
f.error_messages
created_at

6. to get ascii value of a character
puts 12.chr
data migration (db/migrate/..._create_something.rb)
puts ?x where x is the character (not variable)
Modules

7. Unlike regular erb files partials' names begin with an ________
underscore
replace the word "scaffold" with the word "model"
validates_numericality_of
<% form_for() %>

8. h in in <%=h ... %> is a ______ that escapes special characters to sanitize malicious input
render :partial
helper method
rails generate migration AddPhoneToTickets phone:string
always public

9. the model-generator command create the model class (app/models/something.rb) and the ____________
data migration (db/migrate/..._create_something.rb)
runs its validators
RAILS_ENV (RAILS_ENV=production)
config/routes.rb

10. to declare global variables
the class
plural
created_at
put a $ sign in front. For example $x

11. Command to run a migration
ruby make
always public
rake db:migrate
.:format

12. This variable changes the environment
data migration (db/migrate/..._create_something.rb)
RAILS_ENV (RAILS_ENV=production)
Modules
Tweet.find(2).destroy

13. to insert "1 + 1" into a string
#{1+1}
errors.add_to_base("there was an error")
ActionPack
the word "private"

14. This variable changes the environment
attr_accessor
RAILS_ENV (RAILS_ENV=production)
rails generate migration AddPhoneToTickets phone:string
the class

15. to add an error (called "there was an error") in the validate method
errors.add_to_base("there was an error")
data migration (db/migrate/..._create_something.rb)
<% form_for() %>
.:format

16. to generate regular model code (not scaffolding)
CamelCase
rails generate migration AddPhoneToTickets phone:string
Structs
replace the word "scaffold" with the word "model"

17. All constants are _______
include modulename
#{1+1}
migration
always public

18. Rails' application framework
data migration (db/migrate/..._create_something.rb)
ActionPack
rake db:migrate
a responder object

19. tag that starts a form
<% form_for() %>
replace the word "scaffold" with the word "model"
put a $ sign in front. For example $x
puts ?x where x is the character (not variable)

20. the second uri indicate
:controller
ActiveRecord
<% form_for() %>
errors.add_to_base("there was an error")

21. Methods by default are ________
Structs
attr_accessor
#{1+1}
public

22. Rails' object-relational mapping library
puts ?x where x is the character (not variable)
ruby make
Embedded Ruby (ERb)
ActiveRecord

23. Rails' application framework
put a $ sign in front. For example $x
ActionPack
ruby make
created_at

24. Allows instance variables to be accessible outside the class by defining = operators for variables
production
attr_accessor
plural
#{1+1}

25. This is a comparison operator
Tweet.find(2).destroy
#{1+1}
<=> operator
plural

26. A special class whose only job is to have attributes and to hold data
<% form_for() %>
the word "private"
public
Structs

27. A script that alters the structure of the underlying database
ruby make
validate
migration
CamelCase

28. to check if an input is numeric
validates_numericality_of
Tweet.find(2).destroy
include modulename
integration test

29. controller (and table) names are _______
<=> operator
plural
singular
migration

30. to destroy a row with id of 2 using only one line...
Tweet.find(2).destroy
.:format
rake db:migrate
Embedded Ruby (ERb)

31. declaring classes inside another class
Modules
puts ?x where x is the character (not variable)
nested classes
#{1+1}

32. a RESTful application uses ... to define an interaction with the data.
puts 12.chr
HTTP methods (post - get - put - delete)
the word "private"
Tweet.find(2).destroy

33. to create a migration that adds a "phone" field to the "tickets" table
rails generate migration AddPhoneToTickets phone:string
the page template
errors.add_to_base("there was an error")
public

34. models have only ______names
an object-relational mapping library
underscores
Structs
singular

35. Embedded Ruby (ERb) processes data from model objects AND _______ as inputs
Tweet.find(2).destroy
render :partial
the page template
<%= yield %>

36. The "format" in "repond_to do |format|"? is a ______
rails generate migration AddPhoneToTickets phone:string
#{1+1}
<%= yield %>
a responder object

37. Methods by default are ________
public
ActiveRecord
#{1+1}
RAILS_ENV (RAILS_ENV=production)

38. Naming convention for file names
underscores
Embedded Ruby (ERb)
HTTP methods (post - get - put - delete)
always public

39. to generate regular model code (not scaffolding)
Embedded Ruby (ERb)
singular
replace the word "scaffold" with the word "model"
f.error_messages

40. the three "magic columns" are:id - _______ - updated_at
validate
.:format
errors.add_to_base("there was an error")
created_at

41. declaring classes inside another class
integration test
nested classes
underscore
runs its validators

42. controller (and table) names are _______
RAILS_ENV (RAILS_ENV=production)
migration
ActionPack
plural

43. Rails' object-relational mapping library
f.error_messages
ActiveRecord
errors.add_to_base("there was an error")
the word "private"

44. to include a module inside another class/file
include modulename
data migration (db/migrate/..._create_something.rb)
#{1+1}
replace the word "scaffold" with the word "model"

45. This precedes the "check_logged_in" method in a class
the word "private"
always public
validate
Modules

46. Naming convention for classes
underscore
put a $ sign in front. For example $x
.:format
CamelCase

47. Allows instance variables to be accessible outside the class by defining = operators for variables
render :partial
an object-relational mapping library
attr_accessor
migration

48. h in in <%=h ... %> is a ______ that escapes special characters to sanitize malicious input
HTTP methods (post - get - put - delete)
:controller
helper method
validates_numericality_of

49. to get character from ascii value
puts 12.chr
runs its validators
helper method
<% form_for() %>

50. These create namespaces
.:format
Modules
errors.add_to_base("there was an error")
CamelCase