Can I edit an iPad's host file?
I doubt this is possible without extensive jail-breaking, but is it at all possible to edit the iPad's (or any iOS device's) hosts file?
Solution 1:
The previous answer is correct, but if the effect you are looking for is to redirect HTTP traffic for a domain to another IP there is a way.
Since it technically is not answering your question, I have asked and answered the question here:
How can I redirect HTTP requests made from an iPad?
Solution 2:
No. Apps can only modify files within the documents directory, within their own sandbox. This is for security, and ease of installing/uninstalling. So you could only do this on a jailbroken device.