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Cambridge University Press 2011

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Revision questions: 2 Data 1Cambridge IGCSE Computer Studies

1 A shop has our students delivering newspapers to its customers. Each student delivers three

different papers (RECORDER, MAIL and ARGUS). Te shop manager uses a spreadsheet to

record the deliveries as shown below:

A B C D E

1 NAME RECORDER MAIL ARGUS PAID

2 LIZ 21 30 19 rue

3 OM 24 24 22 False

4 DAVE 19 16 26 rue

5 PAM 18 12 23 False

6 OAL

Name the data type in cell:

a A2

b D3

c E5.

2 Te terms le, record and eldare used in databases. Explain the meaning o each term and

explain the connections between them; you may wish to include a diagram.

3 An estate agent uses a computer system to store details about properties or sale. A section o the

properties le is shown below:

Property Type Area Price

4217 D Lake 99.92

4219 D Park 200.00

4220 S Lake 105.50

4221 F Park 175.25

4222 F own 75.00

a Why is coded data used or Type?

b What is the data type or Price?

c What is meant by a key eld? Which is the key eld?

4 a What is meant by analogue data?

b When does analogue data need to be changed into digital data?c What device perorms the conversion?

d Give one application which would use analogue data.

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Cambridge University Press 2011 Revision questions: 2 Data 2Cambridge IGCSE Computer Studies

5 a What is meant by digital data?

b Give one application which would use digital data.

6 Explain the ollowing terms:

a database

b le

c direct access led record

e sequential le.

7 A shop sells bicycles. Inormation about each bicycle in stock is held in a computer le. Part o

the inormation is shown in the table below.

Make Model Type Colour StockNo Price

Smith Sprint Racing B 1471 $200.00

Tompson Maxi Racing B 1329 $185.00

Brown Speed Racing G 1654 $200.00

Davies Swif Mountain R 1972 $0.15

Smith Swallow Racing Y 2015 $300.00

Tompson Fly Mountain B 2149 $400.50

Brown Panther Racing Y 3249 $670.00

a How many elds are shown?

b How many records are shown?

c Give a reason why the shop would need to delete a record rom the bicycle stock le.

d Give a reason why the shop would need to add a record to the bicycle stock le.

e Explain how the shop can print a list o mountain bikes.

f Tere is an error in the table. Which item is wrong? How could this error have

been avoided?

g Which is the key eld?

8 A video club hires lms to members.Te club uses separate database les to store details about

lms, members and the lms hired.

a Name our suitable items o inormation or the FilmsHireddatabase le, speciy the eld

type and give an example o the data.

b Name our suitable items o inormation or the Membersdatabase le, speciy the eld type

and give an example o data.

9 a What is meant by the term validation?

b What is meant by the term verication?

c Describe one method o verication when changing a password.