Chapter 1 Introduction to software engineering

Question 1

What is software

Answer 1

Computer programs and associated documentation

Question 2

For whom may software products be developed

Answer 2

a particular costumer
the general market

Question 3

Types of software

Answer 3

Custom
Generic
Embedded
Real time software
Data processing software
(Some software systems have both real time and data processing aspects)

Question 4

Embedded software

Answer 4

Built into the hardware
Hard to change

Question 5

Generic software

Answer 5

Sold on open market
Often called: COTS (commercial off the shelf), Shrink-wrapped

Question 6

Real time software

Answer 6

Must react immediately
Safety is often a concern

Question 7

Data processing software

Answer 7

Used to run businesses
Accuracy and security of data are key

Question 8

What is software engineering

Answer 8

The process of solving costumers’ problems by the systematic development and evolution of large, high-quality software within cost, time and other constraints

Question 9

Differences among custom, generic and embedded software

Answer 9

Question 10

Difference between software engineering and computer science

Answer 10

Computer science: concerned with theories/fundamentals, not practicalities.
Software engineering: concerned with all aspects of computer systems, including hardware, software processes

Question 11

Nature of sofware

Answer 11

Intangible
Reproducible
Labor intensive
Modifiable
High/rising demand

Question 12

Generic activities in all software processes

Answer 12

Specification
Development
Validation
Evolution

Question 12

Specification

Answer 12

what the system should do and its development constraints

Question 13

Development

Answer 13

Production of the software system

Question 14

Validation

Answer 14

Checking that the software is what the costumer wants

Question 15

Evolution

Answer 15

Changing the software in response to changing demands

Question 16

Types of software engineering projects

Answer 16

Most projects are evolutionary or maintenance projects
- Corrective : fix problems
- Adaptive : support, update
- Enhancement : add features
- Reengineering (perfective): internal cleanup

Question 17

Project stakehloders

Answer 17

Users
Customers
Software developers
Development managers

Question 18

Difficulties and risks of software engineering

Answer 18

Many complex details
Uncertain requirements
Constant change
Uncertainty about technology
Uncertainty about software engineering skills

Question 19

Software Qualities

Answer 19

Usability

Reusability

Reliability

Efficiency

Maintainability

Question 20

CASE

Answer 20

Computer aided software engineering
The use of computer-based support in the software development process

Question 21

Examples of CASE

Answer 21

JDeveloper
Visual Studio
iUML

Question 22

What are the costs of software development

Answer 22

Roughly 60% development
40% testing

Question 23

Internal software qualities

Answer 23

Characterize aspects of the design of the software
Have an effect on the external quality attributes
Example:
The amount of commenting of the code
The complexity of the code
(Reusability)

Question 24

Arranged activities to form a general software process model

Answer 24

1. Specification
2. Design
3. Manufacture
4. Test
5. Install
6. Maintain