interview question from IBM staff: create the signatures, access specifiers, for general card game. It needs to have a deck, be shuffleable, and track the deck separately from cards on table. There are no players in this version of this simple API.

deckcard.cs

C#
class Card {
	public static enum CardType { “HEART”, “SPADE”, “DIAMOND”, “CLUB” }
	public CardType type;
	public int num;
	//said I wanted to use properties with backing fields to limit access to sets, 
	//only provide public gets, but that I wasn’t exactly sure how to do it

	public Card( int type, int num ){
		this.type = (CardType)type;
		this.num = num + 1;
	}
}
class Deck {
	List<Card> deck = new List<Card>();
	List<Card> drawn = new List<Card>();
public Deck(){
		for( int i = 0; i < 13 ){
			for ( int j = 0; j < 4 ) {
				desk.Add( new Card( i,j ) );
			}
		}
		Shuffle();
	}
	public Shulffle(List<Card> from, List<Card> to){
		//temp list
		//randomly select a card from range 0 to size remaining of deck and 
		//move to temp list
		//
	}
	public Card Draw(){
		if ( deck.size > 0 ) {
			Card last = deck.last();
			deck.remove(deck.last());
			return last;
		}
		else
			return null; 
			//upon discuss I raised returning null isn’t best practice 
			//but didn’t have better alternative.
	}
}

class Tester{
	Deck deck = new Deck();
	deck.Shuffle();
	Card deck.Draw();
}