$22.$ Describe three situations that can be good candidates

for denormalization.

$23.$ Describe several techniques that can improve performance of a database.

$24.$ What is the diff erence between interfi le and intrafi le

clustering? Why are they used?

$25.$ What is an index and how can it improve the performance of a system?

$26.$ Describe what should be considered when estimating

the size of a database.

$27.$ Why is it important to understand the initial and

projected size of a database during design?

$28.$ What are some of the nonfunctional requirements that

can infl uence the design of the data management layer?

$29.$ What are the key issues in deciding between using perfectly normalized databases and denormalized databases?

$30.$ What is the primary purpose of the data access and

manipulation classes?

$31.$ Why should the data access and manipulation classes

be dependent on the problem domain classes instead

of the other way around?

$32.$ Why should the object persistence classes be dependent on the problem domain classes instead of the other

way around?