These are good ideas, but when it comes down to it:
Does he/she Love Jesus
Does he/she believe the Bible is the absolute written Word of God
Does he/she have a personal relationship with Jesus, spends time with Him
Does he/she spend time in the Bible, is it important to them on a daily basis
Is the person religious or Spiritual?
Those are the most important questions to ask yourself, because if they are following Jesus, looking unto Him, reading and DOING His Word, then all the other things will be covered