option exchange c++ IV (Princeton/Miami Jul2011)

Q: 3 no-choice scenarios to use initializer list. Efficiency is a 4th reason.
%A: const or reference field, or if one of the fields has no op=
%A: if base class doesn't have a no-arg ctor

Q: What exchanges send you market data feed?

Q: outline a ref-counted copy-on-write string class, showing all the function declarations

Q: how do you see what system calls a running process is calling?
%%A: strace

Q: RTTI is too slow, but somehow (can't remember the context) we need to tell what class (in a hierarchy) this object is. How do you achieve that?
A: use enum field (16b - confirmed. See P121 [[21st century c]])
%%A: now I feel an 8bit char is more compact -- cache and bandwidth efficiency

Can't remember the exact question....
Q: how do you support cout<<myDog;
Hint from questioner -- you can edit Dog class.

P156 [[essentialC++]] has some simple tip

Note overloaded operator is like a method and can be virtual -- http://stackoverflow.com/questions/2969966/c-polymorphism-of-operator-overloading