which is the best hosting service to host the community edition.

[aniruddha]

online hosting services if  any please let us know.

[afaust]

There are no (globally active) Community hosting services as far as I am aware. I don't know about any regional Indian ones.

If you are considering to manage / deal with a cloud-based deployment, then - as usual - AWS, Azure or Google Cloud are the most well known contenders...

[aniruddha]

How can get the app data 

i am shifting my system so i reinstalled alfresco community edition ,i want my data and documents that i ve created in old system how to get that data 

in which file can find the data

[afaust]

You can read up on backup and restore in the documentation.

[aniruddha]

How much would cost to host the alfresco in alfresco cloud only??