urgent enquiries about flour mills of Nigeria GSE test.

I am invited 4 GSE Flour mills of Nigeria test which is to take place @ the University of Calabar on saturday 18-04-09 by 10.00am.The challenge is that i am not used to computer based test unlike the normal written test. l therefore have the following enquiries to make:

1.can there be negative marking in computer based test?

2.Must i answer all the questions?

3.can i leave those questions i am not sure of ?

Your positive and urgent responses will be highly appreciated.ONE LOVE.