Does this code compile? public interface MyInterface { string MyProp { get; } }

190.

Does this code compile?

public interface MyInterface
{
string MyProp { get; }
}

Yes

No, because the interface name does not start with 'I'

No, because MyProp is not declared as public

No, because interfaces can't contain property declarations

Interface names should start with 'I', but this is simply good programming practice, not something required by the compiler. You don't declare interface members as public (or any other access modifier) since they're implicitly public. And yes, iterfaces can contain property declarations (they can't contain fields though).