> Suppose I have 1% equity vested over 4 years with 1 year cliff, what will happen to my stocks?
What does your employment agreement say? Depending on the terms you'll have either 0%, 0.2%, 1%, or some other amount. Really hard to say anything without knowing what's in your employment contract and the types of stock you were issued.
> Its a cash-stock deal. Do I get any cash out of this acquisition?
Again, you'd have to read the terms of the deal. They might pay back the investors at a multiple, and split up the rest to the employees. And it's possible what's left for the employees could be very little, nothing, or a lot. It's really hard to say without any information.
If I were you, I'd read carefully through all the employment forms you signed. And if it's overwhelming, you should have a lawyer read them over to gain a bigger understanding.
Just know that 1% equity doesn't necessarily mean 1% of the deal. It all depends on the terms and the class of stock issued.