Certificates, App ID and Provisioning Profile

Question

For submitting an iPhone app to the App Store, we need to create Certificates, App ID and Provisioning Profile.

I often get confused whith these things (even after read

Answer 1

1. Can the same certificate be used for multiple apps (and both for dev/distribution) ? No, distribution certificates can't be used for development, especially the App Store profile which can only be used to submit an app.

2. Also I guess App Id is unique for each app. But can the same App ID be used for both dev/distribution ?

Yes you can use the same app id for the development, ad-hoc and AppStore.

3. For Provisioning Profile, I think we need to create 1 each for Dev/distribution. Correct?

No, you can create a wildecard development profile * as the app bundle id. You can even create a wildcard AppStore profile. Only apps signed with this profile will not be able to use pushnotifications or InApp purchases.