Program-development life cycle

Question 1

Program development cycle (4)

Answer 1

Analysis
Design
Coding
Testing

Question 2

Analysis (2 ways of doing it)

Answer 2

Abstraction - simplifying the problem by keeping key elements and discarding unnecessary details from the problem

Decomposition - breaks down a complex problem into smaller parts which can then be subdivided even futher until it is solved easily

Question 3

Design

Answer 3

uses** program specification from the analysis stage **to show how the program should be developed

using flowcharts, pseudocode or structure diagrams

Question 4

Coding and iterative testing

Answer 4

coding: program is written and developed,

iterative testing: the code is tested, amended and repeated until the program performs as required

Question 5

Testing

Answer 5

program is run many times with different sets of test data to check for errors

Question 6

Computer system

Answer 6

Made up of systems that can be broken down into subsystems that only perform a single action each

Question 7

Top down design
(structure diagrams)

Answer 7

Decomposition of a computer system into subsystems until each sub-system performs only a single action

Question 8

Components of a computer system/

components of decomposition (4)

Answer 8

Inputs
Outputs
Processes
Storage (variables)

Question 9

Dry run

Answer 9

Manual process of working through an algorithm step by step,

to** trace the value of variables**. There is no software involved in this process.