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Contents
Contents ..................................................................................................................................................................................................... 2
An ICT System and its components .................................................................................................................................................... 3
Data and Information.............................................................................................................................................................................. 4
People and ICT Systems ......................................................................................................................................................................... 6
Transfer of Data in ICT Systems .........................................................................................................................................................10
Safety and Security of Data in ICT Systems ....................................................................................................................................14
Backup and Recovery ...........................................................................................................................................................................17
What ICT can provide ...........................................................................................................................................................................19
Factors affecting the use of ICT .........................................................................................................................................................20
The consequences of the use of ICT ................................................................................................................................................21
20 Mark Questions.................................................................................................................................................................................…read more

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An ICT System and its components
What you need to know:
1 What is ICT?
2 ICT System
3 Components of an ICT System
ICT is the use of technology for the input (1), storage (1), processing (1) of data and the output of information.…read more

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Data and Information
What you need to know:
1 Different forms Data can take
2 Data
3 Information
4 How data can arise
5 Reasons for coded data
6 Factors that affect quality of information
7 Encoded data
Forms of Data ­ Moving images, text, sound, Numbers, Pictures/still images
Data ­ Data just raw facts or figures which have no meaning. (1) An example of this would be the barcode on a
product.…read more

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Questions:
Complete the table below to show the different forms that data can take. The first has been done
June 2012
Qu 2
for you.
Using the example of a supermarket checkout, explain the difference between data and
Qu2
Jan 2012
information.
Figure 2 below shows a camera which is part of an ICT system designed to recognise car number
Jan 2012
Qu6a
plates. The data captured by the camera is processed and used to identify the registered owner of
the vehicle.…read more

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Before this data is entered into a data processing system the customer' s gender is coded as M or
Jan 2010
Qu3a
F and their age group is coded as 1, 2, 3 or 4. Why is this data coded before it is entered?
When the coded data is entered into a data processing system it is encoded.
Qu3b
Jan 201
Why does the data need to be encoded?
Explain, with the aid of examples, the different forms that data can take.…read more

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Effective ICT team - One characteristic is the appropriate allocation of a team member to a task (1) to utilise the
strengths of team member (1) e.g. send a networking specialist to solve a problem relating to a network server.
(1) The team must have adherence to agreed standards (1) to ensure that the resultant system is fully
understandable and maintainable by another team in the future (1) e.g. to provide modifications to the user
manual.…read more

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A national supermarket chain surveyed their customers and found that 10% of shoppers who left a
Qu 6a
June 2010
store without making a purchase said that excessive waiting time at the checkout was the reason
for their decision. The chain has decided to introduce self-service checkouts. The self service
checkout would be used by a variety of customers. Discuss what should have been considered
when designing the interaction for users of the self-service checkout shown above.…read more

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ICT professionals often work in teams. Describe, with the aid of examples, the characteristics of an
Jan 2009 5c
effective ICT team.
You have been asked to design a mobile phone for older users. What would you need to consider
Qu6a
Jan2009
when designing the user interaction with this mobile phone?
Explain, giving reasons for your choice, what type of interface you would recommend for this
Jan 2009
Qu6bi
phone.…read more

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Transfer of Data in ICT Systems
What you need to know:
1 Types of processing and examples
2 Elements required for a network
3 Standards
4 Media used to transfer data across a network
5 Characteristics of local and wide area networks
6 Characteristics of the WWW and the Internet
7 Wireless networking
8 Benefits of networks
9 Intranets and Extranets
Transaction Processing - A transaction is made up of data and processes that update (make a single change) to
the data held on the…read more

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