Ques 48. HOW CAN YOU CREATE PAGE TITLES AND METADATA FOR YOUR PAGES in Ruby on Rails?
You can use the Headliner plugin for adding page titles.
You can use the MetaMagic plugin to add meta tags.
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Ques 49. HOW CAN YOU CREATE BREADCRUMBS ON YOUR PAGES in Ruby on Rails?
Gretel is a great plugin to introduce breadcrumbs in your Rails application.
Another very simple implementation is breadcrumb_on_rails.
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Ques 50. Is Rails Scalable?
Yes Rails gives you complete freedom to use all traditional means of scaling an application. Things like memcached, caching full pages, caching fragments are all supported.
You can use any standard CDN to serve your media and static content as well.
Database scaling using sharding is supported.
Finally heroku makes your life easier by giving you the flexibility to scale up/down based on your need. Mostly websites have a peak time during which you need more servers and then there is a sleep time. Heroku makes that on-demand scaling process simpler. Companies such as HireFireApp.com makes the autoscale process easier.