Salam everyone

I am going to appear in Fpsc exam for network engineer post. I have never appeared in any fpsc exam before, therefore I need help and guidance from members of this group.
I need to know the following.

1. Is there any negative marking?

2. What is the time allotted?

3. Please suggest me a website or book that can be precisely accurate for Fpsc exams related to Computer networks, architecture, operating systems etc.

4. If someone have past papers or any helping material, than please do share it. It will be highly appreciated.

Best Regards