All good questions, since Jehovah is Love we can be sure his judgement will be just. The heart condition is of course very important and he will take into account every situation so it is hard to just generally label what will happen with each group.
As a form of disclaimer, these are just my thoughts and they should be taken as such. I am not representing the whole organization nor do I want to even attempt to do so.
Will a disfellowshipped person survive Armageddon?
Being disfellowshipped is a form of discipline and does not mean that Jehovah does not love that person. If the person has a good heart and has taken some steps to rectify his/her conduct, then I'm more than sure Jehovah will give that person an opportunity.
Will a disassociated person......?
This one is tough because there are extenuating circumstances to why someone will make this decision. Jehovah will analyze each situation and will always look for an excuse to forgive.
Will an inactive person.....?
Again, depends on the situation. Why did the person become inactive? Jehovah knows all so he is the best place to decide.
Will a weak person......?
I believe we are all weak in one way or another since we are imperfect. Even someone that might appear to be strong spiritually will have weak moments, days, or longer. I am sure Jehovah will save these.
Will someone how has shown no interest in 'the truth'....?
Unfortunately, they had an opportunity and if they don't seize it then there are consequences. The people in Noah's days had about 50 years to make a decision to enter the ark. They didn't. The egyptians had an opportunity that many of them took to join Jehovah's people after they were liberated. The Canaanites had 400 years to make changes and they had knowledge of Jehovah. The Gabaonites took advantage of this opportunity that Jehovah gave and found way to not be destroyed. Jesus gave instructions about the coming destruction of Jerusalem and those that followed the instructions survived.
So Jehovah always gives opportunities.
Will someone who has rejected 'the truth'....?
Could there be some extenuating circumstances for rejecting the 'the truth' or the organization? That is something that Jehovah will take into account. Some have mental problems that are out of their control. Some have been deeply hurt or offended and Jehovah must take that into account. So there is not a yes/no answer, each individual case is different. But, if someone is openly campaigning against Jehovah's organization, that person will not survive.
Will somone in 'the truth' but leading a double life....?
If this is happening at the time Armageddon hits, I think it would be a tough sell for that person to get Jehovah to be merciful. But you never know. Look at the case of Manasseh (spelling?) in the Bible.
I want to add a couple of more questions to your list if I may.
Will a practicing Jehovah's Witnesses survive Armageddon?
Once again, it is not guaranteed. The once that is faithful until the end will be saved. Also Jehovah will examine their heart condition and what really motivates him to serve.