No
to make a cheesecake you will need to use about 8 digestive biscuits (you can use more than 8 if you want)
There are small holes in mcvities digestive biscuits because when they are baking them in the oven, the biscuits need some "air" so that they do get baked properly. (no mushy stuff left in the middle) lol.
McVities
8.5p
Digestive biscuits are slightly sweet, wheat-based biscuits with a crumbly texture, while graham crackers are sweeter, made with graham flour, and have a firmer texture. Digestive biscuits often contain whole wheat flour and oatmeal, while graham crackers are made with graham flour, sugar, and sometimes honey.
A digesive Biscuit is a wheat biscuit, sometimes with chocolate on the botom=]
The McVities ones are made in West London, UK.
Chocolate Digestive or Yorkshire Biscuits
No, it is not. Despite popular belief to the contrary, there is no prohibition against digestive biscuits in America. They are readily available in many US grocery stores, either in the imports section or "cookie" aisle. Note: I am an American, living in America, writing this while having a cup of tea and a digestive biscuit that I bought in a pack last night. Don't believe something just because you see it on a quiz show, fact check it.
In Ireland and England alike, cookies are chocolate-chipped circular biscuits. If you're American, I think you call all biscuits cookies. If so, the answer you are looking for is biscuits.
There is no specific collective noun, but they would normally be known as a packet of biscuits or tin of biscuits.