Class notes
CompSci Software (Year 11/GCSE/Nat 5)
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Complete class notes of computer science software course Year 11 with diagrams and practice questions and exam tips. In Visual Basic, pseudocode, and example code.
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Software D & DDevelopment Methodologies
It is an interactive process meaning that the process or parts of it, are repeated until the program is finished.
Analysis -> Design -> Implementation -> Testing -> Documentation -> Evaluation
Analysis - work out purpose of program and functional requirements
Design - decide user interface and what data needs to be stored, design algorithms
Implementation - will take prepared designs and write code to create program
Testing - find syntax and execution errors. create tests to identify errors
Documentation - make user guides and technical guides to support software
Evaluation - check if program is fit for purpose, efficient, robust, and readable
Analysis
Purpose
A program’s purpose is what the program is devised to do. An in-depth list of all the functions a program has to
carry out is also decided then.
Functional requirements
- input - data a program gathers from user
- processes - calculations/ data generated by the program
- output - results & messages shown to the user.
Design
User interface
This can be carried out by designing a wireframe for the program.
Structure diagrams
85
, Flowcharts
Pseudocode
Text based design method to write a program in understandable, non-programming language. Can write
algorithms without specific corresponding syntax.
Pseudocode Visual Basic
- g et price from user - rice = InputBox(“Please enter price”)
p
- display price - MsgBox(“The price is ” & price )
86
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