Important Ruby on rail Interview Question

1.About Ruby

2. Advantages of Rails
3.Symbols and string differences
4.Collections and members differences
5.ORM
6.Associations in rails
7.Render and Redirect Differences
8.Without Databse.yml file use mysql in Rails app how?
9.Helpers
10.Active record usage
11.Inheritance and multi inheritance
12.class,modules,methods
13.Migrations
14.Naming conventions
15.Bang methods
16.Variables in ruby
17.Super class
18.Nil and false difference
19.Class methods in ruby
20.Bundler in rails app
21. require and load difference
22. include and exclude
23.Rake usage
24.Rails 2.x and Rails 3.x difference
25.Rails 3.x new changes
26.Assets pipeline
27.Encapsulation
28.Enumerator
29.Active merchant for pay-pal
30.Active warehouse
31.request.xhr for ajax
32.Static and dynamic scaffolding difference
33.gemfile and gemfile.lock
34.destructive methods
35.Garbage collection
36.proc and lamda
37.puts nad print difference
38.servers supported by rails
39.meta programming
40.TDD and BDD
41.Rspec
42.attr_accessible ?
43.call_backs
44.save amnd save!
45.polymorphic true
46. REST routes
47. root_url and root_path
48.filters
49.flash in rails
50.h function
51. haml
52.slim
53.rjs file usage
54.ruby nil object_id = 4 why?
55.match and map in routes
56.gems and plugins