Those that have taken the exam are not allowed to discuss the questions. My only advice is to study every guide mentioned in the exam blueprint.
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The "magic numbers" are a must. But only a part of the questions are about those limit.
Follow the blueprint, the official documentatio and make a lot of labs.
The official Blueprint is available at:
Some version with study notes:
As the others have said the exam blueprint is key here, it will tell you what you get tested on. It is safe to say that there will be questions where the answer will be a number, a maximum or a default number. I have loads of VCP4 information on my blog and website - links below.