In case you are new to HTML 5 application cache please see these HTML 5 application cache interview questions http://www.dotnetinterviewquestions.in/article_what-is-application-cache-in-html5-aspnet-html-5-interview-questions-with-answers_184.html written by www.questpond.com for better understanding before proceeding to the below interview questions.
What is fallback in Application cache? ( HTML 5 Application cache interview questions with answers)
Fallback in application cache helps you to specify the file which will displayed if the server is not reachable. For instance in the below manifest file we are saying if someone hits “/home” and if the server is not reachable then “homeoffline.html” file should be served.
FALLBACK: /home/ /homeoffline.html
What is network in application cache ?
Network command says files which should not be cached. For example in the below code we are saying that “home.aspx” should never be cached and or available offline.