chapter 4

Question 1

requirement

Answer 1

an expression of desired behavior.
focus on the customer’s needs.
the “what” instead of the “how.”

Question 2

software requirements specification (SRS)

Answer 2

performed by analyst or system analyst.

they are responsible for obtaining user’s requirements.

Question 3

stakeholders

Answer 3

any person who is impacted by the system.

anyone who has a stake.

Question 4

clients

Answer 4

pay for the software to be developed.

Question 5

customers

Answer 5

buy the software after it’s developed.

Question 6

users

Answer 6

use the system.

Question 7

domain experts

Answer 7

familiar with problems that the software must automate.

Question 8

market researchers

Answer 8

conduct surveys to determine future trends and potential customers.

Question 9

lawyers or auditors

Answer 9

familiar with the government, safety, or legal requirements.

Question 10

software engineer

Answer 10

technology experts

Question 11

means of obtaining software requirements

Answer 11

interviewing stakeholders.
observing current systems.
brainstorming with current and potential users.

Question 12

types of requirements

Answer 12

functional requirements: required activities.
quality requirements (non-functional): quality characteristics the software must posses.
design constraints: platform, interface, etc.
process constraints: restriction on techniques or resources that can be used.

Question 13

requirements: essential

Answer 13

must be met.

Question 14

requirements: desirable

Answer 14

not necessary but nice to have.

Question 15

requirements: optional

Answer 15

possible but could be eliminated.

Question 16

entity relationship diagram (ER-Diagram)

Answer 16

entity: real world objects (rectangle).
relationship: edge between two entities. (diamond in the middle; specifies type of relationship)
attribute: annotation on entity, describes properties or data of the entity.

Question 17

uml

Answer 17

unified modeling language.

Question 18

uml: underline

Answer 18

class variable; all instances share the value.
library system, a loan class might share the "loan period" variable; all books have the same lending period.