Of course, there are difference in the syntax. For such an open question, you just need enumerate the main points. If you could give some examples, however, you will kill a lot of time. By the way, if you could say something about the advantage of class over struct, you may show people that you are really object-oriented.

: The default member and base class access specifiers are different.

This is one of the commonly misunderstood aspects of C++. Believe it or not, many programmers think that a C++ struct is just like a C struct, while a C++ class has inheritance, access specifiers, member functions, overloaded operators, and so on. Some of them have even written books about C++. Actually, the C++ struct has all the features of the class. The only differences are that a struct defaults to public member access and public base class inheritance, and a class defaults to the private access specifier and private base class inheritance. Getting this question wrong does not necessarily disqualify you because you will be in plenty of good company. Getting it right is a definite plus.