Program File or Data File? Microsoft Access Downloaded past paper from SQA website
Program file Data File
Image of school badge Adobe Photoshop Profit/Loss spreadsheet Windows XP
Data file Program file Data file Program file
Systems Software or Applications Software? Microsoft Publisher Paint Anti-virus Solitaire Disk defragmenter
Application software System software Application software System software System software
Windows XP System software
Interactive or Real-time? Real-time
Missile Guidance System
Withdrawing cash from an ATM
Library lending system Buying a DVD on Play.com
Heat control in a Nuclear Power station
Heart monitor in intensive care
Operating System List the 5 functions of the Operating System • Provides the HCI • Controls input and output devices • error reporting • Decides save destinations of files •
Sucks, ubuntu is better
Software Portability Some software is portable. Describe what this means. It means that something can be moved easily and can fit in a pocket or bag and usually has a battery so it can be used without a power supply, for example a mobile phone
Device Drivers Device drivers are • Software • Program files • Systems Software Explain the function of a device driver • To allow the computer to communicate with a device Printing a document runs as a background job on a computer system. What does this mean? • It means that it is not visually visable to the user
Filing systems • Draw an example of a hierarchical filing system
• Draw an example of a flat filing system
Sequential & Random Access Explain how sequential access works • An example is
Explain how random/direct access works • An example is
Central Processing Unit
Click and drag the text boxes and arrows to the appropriate position on the diagram above Registers
Backing Storage Devices
The Processor Describe the function of each of the following: • Control Unit
• Arithmetic & Logic Unit (ALU)
Memory Describe two differences between RAM and ROM •
Data Storage Explain how the processor can find data stored in main memory.
What happens to the processor speed if the word length is increased? Explain your answer.
Bits and Bytes What does bit stand for? How many bits are required to store 1 character? Complete the following table: • 1 Byte = ?? bits • 1 KB = ?? bytes • 1 MB = ?? kilobytes • 1 GB = ?? megabytes • 1 TB = ?? gigabytes What does TB stand for? Find out what comes after TB
Representing Text • What does ASCII stand for? • How many bits are required to represent each ASCII code? • What is the 8 bit binary representation for the decimal number 21?
Calculate the size of this bit-mapped image.
Hardware Create three boxes labelled Input Devices, Output Devices and Backing Storage Devices. Drag each of the 20 images to the appropriate box. Can you name each device?
Backing Storage Put the images in the correct boxes. You may have to duplicate some of the images. Magnetic
Comparison of Backing Storage Use the internet to find the capacity for each of the following storage media
£50 - £1000
Depends on Contents
Depends on Contents
£10 - £50