D Question 29 4 pts Systems testing none of the other answers are correct test each part of the system separately provides the final certification that the system is ready to be used in a production setting o test the functioning of the system as a whole in order to determine if discrete parts of the system will function together as planned D Question 30 4 pts You are a manager installing a self checkout system in a grocery store. Which of the following implementation strategies would you use? O parallel and phased O phased direct cutover