I'll turn this around: how do you know these questions are not part of a deception to lead you away from him? Furthermore, if Christianity isn't right, then what is?
I myself believe without doubt that the Christian God is the one true God, and that the Bible is right about him, and who Jesus is and what Jesus did. Why? My faith was whittled away to the point where I didn't believe the Gospel anymore, at least not for me. I was tormented at this time by my own guilt, and what turned out to be lie after lie from Hell itself. Whoever the one true God was, I wanted him on his terms if he was interested. So I called out to him, letting him know this, and that I was his. If what the Bible said about Christianity was true, I wanted to be a Christian, believe it, and give him my life. If not, I'd seek something else. I figured if there was a greater god out there, or if God preferred some other faith, there would be no change at all. If God could not hear me, then there would of course be no deliverance, since I had tried to believe multiple times in the earlier weeks and failed. I always relapsed back. And of course if there was no God, then there would be no help either. However, God inexpressibly gave me faith, peace, and improvement. I was not stable yet, but in the weeks after I had not experienced one of those relapses. And growing in the knowledge of God, taking a hold of his promises made me fully stable again, to stay. This may sound nuts to some people. They will of course have to account for their dismissal of it to the God who delivered me, and who delivers everybody. If you believe it and this encourages you, good. But I have to respond with this part of God's story in my life in response to your question.