Questions

Configuration management is not concerned with the choice of the hardware configuration for an application.

Configuration management is concerned with the development of procedures and standards for cost-effective managing and controlling charges in an evolving s/w system.

It includes

1)software versions maintenance

2)controlling changes in documentation

3)controlling changes to the source code

4) management activities

Yes, future is always infront of us, but no one can see it.

A restrictive clause is one that limits the meaning of the word it describes.

For example :: 

The girl who lives next door is beautiful.

This restrictive clause limits "the girl" to say it's specifically the one next door.