Software Development Models

Question 1

Software process

Answer 1

Defines way to produce software, includes
Software life cycle model
Tools to use
Individuals building software

Question 2

Software life cycle model

Answer 2

Defines how different phases of the life cycle are managed

Question 3

Phases of software development

Answer 3

1)requirements gathering
2)specification
3)design
4)code
5)testing
6)implement

Question 4

Build and fix model

Answer 4

Why is it bad needs life cycle model, phases, milestones

Question 5

Waterfall method

Answer 5

Output from one phase put on next phase
One phase completed before next begins
Advantage each phase well documented
Disadvantage if mismatch between what client wanted and what was built will not know until delivered

Question 6

Iterative development models

Answer 6

Process of establishing requirements designing building and testing a system done as a series of smaller developments
Regression testing important

Question 7

Incremental model

Answer 7

Break system into small components
Construct partial implementation of system
Then gradually increase functionality
Each release adds functions to previous release until it’s built

Question 8

Testing within a life cycle model

Answer 8

Divide and conquer task of testing
Testers should be involved in reviewing documents as soon as drafts available
Ad hoc test - component test - integration test - system test - acceptance test

Question 9

V model levels

Answer 9

1)component testing
2)integration testing
3)system testing
4)acceptance testing

Question 10

Tooling

Answer 10

Doesn’t replace existing lifecycles
Sometimes integrated into a life cycle model
Speeds up software engineering
Tooling support for all lifecycle phases

Question 11

Influences on the test process

Answer 11

Nature and type of faults to test for
Object under test
Capabilities of developers, testers, users
Different purposes of testing
-detect faults
-provide evidence software works

Question 12

Staged testing moves from small to large

Answer 12

Start by testing each component individually
Then test groups of programs
Then combine subsystems and test systems
Then combine single systems with other systems and test

Question 13

Levels of testing have different objectives

Answer 13

Individual components tested for conformance to their specification
Groups tested for conformance to physical design
Sub systems tested for conformance to functional specifications and requirements