Service-oriented architecture is best described as:

	a.	combining small, modular applications
	b.	load balancing across server clusters
	c.	defining small market segments
	d.	optimizing database query structures
	e.	reengineering business processes

Cloud service models offer different types of software to run on their servers. Comparing how much pre-installed software the various models provide (">" means "has more than"):

	a.	PaaS > SaaS > IaaS
	b.	SaaS > PaaS > IaaS
	c.	IaaS > PaaS > SaaS
	d.	SaaS > IaaS > PaaS
	e.	IaaS > SaaS > PaaS

Although any retailer could build a product recommender system, the usefulness of Amazon s recommender system would be difficult to replicate primarily because Amazon has:

	a.	a big cloud system
	b.	partnerships with book publishers
	c.	a long history of transaction data
	d.	advanced security tools
	e.	data about stated customer preferences