Description and exemplification of pseudocode and one graphical design notation (structure diagram or other suitable) including data flow.

I was looking for some software to create structure diagrams and I though you might want a little refresher over this part of software development

A structure diagram is a way of describing a program’s structure graphically. Each program steps is broken down in to smaller and smaller steps. They are read from top to bottom and right to left

They are sometime referred to as a

Structure charts

A diagrammatic method of designing a solution to solve a software problem.

Here is a sample of a SQA question from the 2009 paper

As for data flow this post should cover it.