How many pins are on a DDR3 memory module?

The old human telephone “switches” were quaint but very slow. You would signal the operator and say you wanted to speak to Jill, but the operator, knowing Jill was visiting Sally, would connect you there. Other than slowness or inefficiency, what are two other disadvantages of this scheme

What will be an ideal response?

The Big Three consists of which three from this list?

a) Default constructor b) Copy constructor c) Constructor with two parameters d) destructor e) Operator=