When you order a fried egg in a restaurant, the level of doneness of the yolk can vary depending on your preference and how you specify your order. Here are the common terms used to describe the doneness of a fried egg and what they typically entail:

1. **Over Easy:** In this preparation, the egg is fried on both sides, but the yolk remains runny. The egg is flipped once during cooking, allowing the yolk to cook slightly while still remaining liquid.

2. **Over Medium:** Similar to over easy, but the yolk is cooked slightly more, resulting in a thicker, partially cooked yolk that is still slightly runny.

3. **Over Hard:** In this preparation, the egg is fried until both the whites and the yolk are fully cooked through. The yolk is no longer runny and is fully set.

4. **Sunny-Side Up:** In this preparation, the egg is fried on one side only, leaving the yolk intact and runny. The egg is not flipped during cooking.

5. **Scrambled:** The egg is beaten and then fried until fully cooked, resulting in a mixture of cooked whites and yolks that are evenly distributed.

When you order a fried egg in a restaurant, it's essential to specify how you want the egg cooked, especially regarding the doneness of the yolk. If you prefer the yolk to be broken or cooked hard, you can request it as "over hard." However, if you prefer a runny yolk, you can specify "over easy" or "sunny-side up." The server or chef will prepare the egg according to your preferences.