I am trying to build an application which requires access to friend's feed posts. Is it possible to retrieve friend's wall posts using graph API? I checked out in the developer console and found no such funstionality. If possible can someone explain me how do i go about retrieving it?
friend permissions are gone, and read_stream will not get approved by Facebook unless you are building an App for a platform without a native Facebook client. So there is no way to get access to friend walls - unless they authorize your App too. You can use user_posts for that.
You can read more about all the changes in the changelog: https://developers.facebook.com/docs/apps/changelog
Facebook improved privacy for users, that´s why you can´t get any details of users who did not authorize your App.