As Level Ict

Front 1

How can data errors occur?

Back 1

-incorrect decisions result in loss of money.

-good may be sent to the wrong address.

-loss of trust.

-prosecution under DPA 1998.

Front 2

What errors can occur during transmission?

Back 2

Passes information through communications medium.

Mustn't be corrupted in any way.

Parity checks can be used to check for corruption.

Front 3

What errors can occur during transcription?

Back 3

Transfer of data to the computer. Problems usually arise from not understanding someone talking, poor handwriting out misinterpretation.

Front 4

When do transcription errors take place?

Back 4

Humans filling in data or filling in forms.

Not proof reading.

Incorrect data is often valid but isn't necessarily correct.

Front 5

What errors can occur during the input of data?

Back 5

Data that has been checked via validation or verification may still be incorrect.

To avoid incorrect input keep human interaction to a minimum.

Use MICR, barcodes etc.

Front 6

What is errors can occur during processing?

Back 6

Programming error which is usually undiscovered during testing and this can result the program in crashing.

Files aren't up to date wrong information is put into spreadsheets leading to wrong output.

Damage by virus.

Front 7

What errors can occur during transposition?

Back 7

If you are typing information into the computer at high speeds usually the swapping of letters.

Front 8

What is validation?

Back 8

Checks that data entered is sensible and reliable.

Front 9

What is verification?

Back 9

Checking that the data entered matches the original source of data.

Front 10

Data type check

Back 10

Checks that the data entered is the same as the data specified for that field.

Front 11

Length check

Back 11

Checks the data entered has the same amount of numbers specified i.e phone numbers have 11 numbers.

Front 12

Presence check

Back 12

Checks data is present. Passwords.

Front 13

Range check

Back 13

Data entered is within a particular range. Mornings between 1 and 12

Front 14

Format check

Back 14

Data entered is the right combination such as postcode.

Front 15

Check digit

Back 15

Check digit added to important numbers such as account numbers and then check can be carried out to ensure the correct number is entered correctly.

Front 16

'OR' check

Back 16

'Miss' or 'MR'

Front 17

Proof reading

Back 17

Carefully comparing the data entered to the data on the original form

Front 18

Double entry

Back 18

Enter the same data twice and if the two sets are identical it will be accepted.

Front 19

Repetitive processing

Back 19

Processes similar tasks and are repeated over and over again with just a few small changes such as billing systems

Front 20

Speed of processing

Back 20

Faster data is processed the faster the results are outputted.

Front 21

Data storage capacity

Back 21

Via a loyalty card supermarkets can find what the customers like and inform them of special offers.

Front 22

Accuracy

Back 22

much higher than a manual system.

Front 23

Speed of communications

Back 23

Companies communicate via networks. Letters are to slow.

Front 24

Produce different output forms.

Back 24

Graphs.

Front 25

Combining of data

Back 25

Companies can perform complex searches.

Front 26

Security of data processes

Back 26

Easier backed up than manual.

Front 27

Effects of hardware on efficiency of data processing systems

Back 27

Software uses capability of hardware and only runs on particular hardware. More mentor the more commands that can be run at the same time.

Front 28

Effects of software on the efficiency of data processing systems

Back 28

Correct software is bought to perform the tasks. Some contain bugs

Front 29

Suitability of operating systems and the efficiency of data processing systems.

Back 29

Check what operating software is needed to run a particular software.

Front 30

Effects of communication affecting the efficiency of data processing systems

Back 30

New system is developed Ali staff need to be involved in the development.

Front 31

Effects of GIGO

Back 31

Output is dependent on the input.

Front 32

What is CAD?

Back 32

The use of computer systems for the design of an item.

Front 33

What is CAM?

Back 33

Use of computer based system to control the machinery in manufacturing process.

Front 34

If the CAD system designed a T-shirt transfer what does the CAM system do?

Back 34

Cut the transfer out.

Front 35

Examples of CAD

Back 35

Producing kitchen of bathroom designs, gardens, buildings.

Front 36

Examples of CAM

Back 36

Manufacture components used in car engines and gear boxes

Front 37

Features of CAD packages

Back 37

Zoom

2D & 3D

Rotation

No prototype needed.

Layering

Hatching out rendering: finished on a building.

Wiredressing

Walkthrough

Front 38

Advantages of CAD

Back 38

Easily stirred, transferred and altered.

Be in 3D

Easily scanned up or down

Only allow you to design stage buildings.

Front 39

Features of CAM

Back 39

Dashes the input from CAD packages and uses the information to create a set of instructions.

Can be reprogrammed easily.

Front 40

Advantages of CAD

Back 40

Cheaper to manufacture

Faster time from design to manufacture.

Better quality

Lower wages cost

Machines can be re-programmed

Front 41

Hardware input devices for CAD and CAM

Back 41

Keyboard and surcharges mouse.