Details

Question 1

True or false: rails g controller NAME - NAME should be plural?

Answer 1

True.

Question 2

True or false: rails g model NAME - NAME should be plural?

Answer 2

False.

Question 3

True or false: migration are created when a model is generated?

Answer 3

True.

Question 4

In Ruby, how is a multi-line comment created?

Answer 4

=begin…=end

Question 5

What does an exclamation point (!) mean in .capitalize! and other Ruby string methods?

Answer 5

If an ! is present, the existing string is destructively altered rather than a new string being spawned.

Question 6

Ruby loops and iterators include:

Answer 6

Unless, While, Until, For

Question 7

What’s the syntax difference between an inclusive and exclusive FOR statement?

Answer 7

Exclusive: 1…20 (three dots), inclusive 1..20 (two dots)

Question 8

What closes a “loop do” statement?

Answer 8

Break if condition…end.

Question 9

Syntax of a Ruby LOOP statement?

Answer 9

counter = 1; loop do…break if counter…end

Question 10

Ruby on Rails common migration options (6):

Answer 10

default: , limit: 29, null: false, first: true, after: email, unique: true

Question 11

Generate a migration to add columns to a table.

Answer 11

rails g migration AddTo col1:string col2:integer col3:boolean

Question 12

Generate a migration to remove columns from a table.

Answer 12

rails g migration RemoveFrom col2:integer

Question 13

List 5 additional migration commands.

Answer 13

rename_column :zombies, :bio, :description
rename_table :zombies, :ghouls
drop_table :zombies
change_column :zombies, age: integer, limit: 4
change_column_default :zombies, :is_admin, default: true

Question 14

What is this syntax called? { :name => “Jon” }

Answer 14

Rocket syntax.

Question 15

What is this syntax called { name: “Jon” }

Answer 15

Hash syntax. It’s the preferred data definition syntax in Ruby 1.9.

Question 16

Ruby on Rails common migration options (6):

Answer 16

default: , limit: 29, null: false, first: true, after: email, unique: true

Question 17

Generate a migration to add columns to a table.

Answer 17

rails g migration AddTo col1:string col2:integer col3:boolean

Question 18

Generate a migration to remove columns from a table.

Answer 18

rails g migration RemoveFrom col2:integer

Question 19

List 5 additional migration commands.

Answer 19

rename_column :zombies, :bio, :description
rename_table :zombies, :ghouls
drop_table :zombies
change_column :zombies, age: integer, limit: 4
change_column_default :zombies, :is_admin, default: true

Question 20

What is this syntax called? { :name => “Jon” }

Answer 20

Rocket syntax.

Question 21

What is this syntax called { name: “Jon” }

Answer 21

Hash syntax. It’s the preferred data definition syntax in Ruby 1.9.

Question 22

What does RAKE NOTES do?

Answer 22

Rake notes will search through your code for comments beginning with FIXME, OPTIMIZE or TODO. The search is done in files with extension .builder, .rb, .erb, .haml and .slim for both default and custom annotations.

Question 23

What does the prefix BUNDLE EXEC do?

Answer 23

bundle exec is a bundle command to execute a script in the context of the current bundle (the one from your directory’s Gemfile).