Milan
I dont mean to discourage you, but if you are scoring 60-65 in Marcus mocks, IMO you are cutting it fine.
Are your thorough in the FAQ available on the Ranch, That should help you through all fundamental questions. Anil Bachi's tutorial on strings will get you through all
string questions. Threads you should be comfortable with the idea of how it works.
I/O just go thro all the constructors.
Very important, dont let your adrenalin pump up. You can't waste time. I drew a blank for the first 15 minutes. Some deep breaths might help, although it didnt help me.
If I were you I would try to score at least 75 to be on the safer side. It hurts if you have to do it a second time.
Weigh the Pros and Cons unless you are in a real hurry.
GOOD LUCK anyway.