It depends on what they had for the main meal. In a dairy meal, the kosher person will typically eat "normal" desserts (such as cake, ice cream, pastries - like panna cotta, fruit etc.). In a meat meal, the kosher person will have to eat options that do not contain dairy, such as fruits, sorbets, tofu-ice-cream, or dairy-free cookies.
Yes, basil is kosher.
Kosher is not a person, so it can't eat anything. But the blood of mammals and birds is not kosher, so people who keep kosher can't eat it.
Jews who keep kosher do not eat prawn, since it's not a kosher species of sea creature.
Jewish people who keep Kosher do not eat ham because pork is forbidden by their dietary laws. Jewish people who do not keep Kosher can eat ham.
Kosher refers to food that is prepared according to the laws of kashrut. The people who keep kosher are Jews. Kosher is a classification, not a people. That being said, if the nachos and salsa are certified kosher, religious Jews who keep kosher can eat them.
Snails are not kosher, so Jews who follow the rules of kashrut do not eat snails. However, not all Jews keep kosher, so some Jews do eat snails.
Hindus do not eat beef no matter if it is Kosher or non-kosher.
It depends on the level of observance. Orthodox Jews eat nothing BUT kosher foods.
Raw carrots are kosher, as long as the utensils used to cut it are clean (although some would insist that the utensils must be kosher as well). People who keep strictly kosher will not eat food that has been cooked with any non-kosher product. They would also not eat it if it was cooked in a non-kosher pot.
Kosher is the diet of Jews. Jews keep kosher. If you keep kosher you cannot eat: shellfish, pork, or dairy mixed with meat. The main land of Jews is Israel. So technically, the nationality of kosher is Israel.
Kosher food is not like a specific food. It is not like Hamburgers or anything. SOme foods are kosher and others aren't. Since most people eat all types of food, you can't really avoid eating kosher food.
No, but halal-keeping people can eat kosher food, except for anything containing alcohol.