I was asked to register with them.

I received a call to take an online C++ test.

The C++ test was one hour, multiple-entry, with questions covering advanced C++ and the STL.

It was a fairly average test; I got a score of 3.06 (you get an interview call if you score above 3.0).

I was asked to prepare on exception handling and the STL for the telephonic interview.

The interview was postponed, and someone else conducted the interview with different questions, not on the STL.

Some of the questions were:

• What does the compiler do if I only declare a class as Class A { };?
• Some questions on copy constructors.

The point is these questions are tricky, as it's a telephonic interview and not on paper, and you can't really visualize what the question actually is. So, be prepared with paper and pen and just keep writing whatever you hear.

What does a C++ compiler do if I declare a class only as:

class A {};

Why do you need a copy constructor?