How does node import happen when importing from features module? I used the Node export module to export few pages into features; when I import it is randomly imported.  

Is there any particular pattern that it is followed while importing? I want to make a particular page as node 1.
That kind of thing is not really possible. The problem is that the node id is serial, so on one machine it will have on id but on another machine it will have another id. Also the the node id is the primary identification, so changing it is not always that easy (if you have comments etc.)

For this kind of thing, UUIDs is really needed (Universally Unique ID). There are modules for this in Drupal 7 and it's being worked on in Drupal 8, but neither will effect the node id, instead it will maintain a UUID which will be the same on all machines that has the node imported.