1.

What's the main reason why cloud services only became popular about ten years ago and not sooner?

a.early Internet data transfers were not fast enough

b.smartphones were not widely used

c.CPUs were not fast enough

d.user interfaces were awkward

e.digital storage was too expensive

2.

The two-phase commit transaction model is designed toward what primary goal?

a.supporting mobile users

b.preventing security breaches

c.speeding transaction processing

d.ensuring database consistency

e.minimizing network load

3.

Why would a business using client-server architecture most likely adopt the n-tier model?

a.to keep up with broadband connection speeds

b.to allow interfacing with cloud systems

c.to ensure database operations remained isolated

d.to be compatible with current HTML standards

e.to facilitate users switching between applications and data sources

4.

When all of a business' transactions are isolated, we know that:

a.its databases are completely secure

b.different transactions will not interleave

c.the system will provide a high degree of concurrency

d.all of the above

e.none of the above

5

Amazon's recommender system effectively makes _____________ available to customers.

a.strategy development

b.rollback records

c.business intelligence

d.business process re-engineering

e.SWOT analysis