IGCSE Computer Science - Chapter 9: Problem-Solving and Design

A COMPUTER SYSTEM is made up of software, data, hardware, communications and .............;

• People

• Administrator

• Operating System

• Manager

.................. ................... is the breaking down of a computer system into a set of sub-systems, then breaking each sub-system down into a set of smaller sub-systems, until each sub-system just performs a single action.

• Structure diagrams

• Pseudocode

• Flowcharts

• Top-Down Design

.................. ................... shows the design of a computer system in a hierarchical way, with each level giving a more detailed breakdown of the system into sub-systems.

• Structure diagrams

• Pseudocode

• Flowcharts

• Top-Down Design

.............................. shows diagrammatically the steps required for a task (sub-system) and the order that they are to be performed. These steps together with the order are

called an ALGORITHM.

• Structure diagrams

• Pseudocode

• Flowcharts

• Top-Down Design

........................... is a simple method of showing an algorithm, using English-like words and mathematical operators that are set out to look like a program.

• Structure diagrams

• Pseudocode

• Flowcharts

• Top-Down Design

If "num1=6" and "num2=9"

What is the output?

• Num1 is largest

• Num2 is largest

• 6 is largest

• 9 is largest

If "Num1 = 3" and "Num2 = 5"

What is the output?

• PRINT Num2 is largest

• 5 is largest

• ELSE PRINT 5 is largest

• PRINT 5 is largest

Which one of the following is not a TEST DATA?

• Big Data

• Erroneous or Abnormal Data

• Extreme Data

• Boundary Data

Testing also needs to be done to prove that the solution does not give incorrect results. In order to do this, test data should be used that will be rejected as the values are not suitable.

• Normal Data

• Erroneous or Abnormal Data

• Extreme Data

• Boundary Data

This is used to establish where the largest and smallest values occur. It has 2 inputs

• Normal Data

• Erroneous or Abnormal Data

• Extreme Data

• Boundary Data