questions in this section
.
1.
Convert the decimal number 27 into an 8 bit binary number.
2.
Define a
computer virus
.
3.
Name
two
parts of a processor.
4.
State an appropriate storage medium for storing a two hour movie.
5.
State
one
economic factor that has led to the development of the Internet.
6.
State
one
difference between machine code and a high level language.
7.
A user consults a technical guide to help him install software.
State
one
other feature that should be included in the technical guide.
8.
State the benefit of using internal commentary within a computer program.
9.
Describe
one
method of creating a macro.
10.
State
one
logical operator that could be used when creating code.
11.
A program has been created to check dates. A user enters the number for the
day
of the month
. Test data for January is shown below:
State
two
possible values for exceptional data.
12.
Name the standard algorithm required to check that the correct length of password
has been entered.
questions in this section
.
13.
A local sport centre issues membership cards.
(
a
)
State
one
reason why a
digital camera
rather than a
webcam
is used to capture a
member’s photograph.
(
b
)
State the most appropriate type of application package for storing details about
1,500 members.
(
c
)
The sports centre must comply with the
d
ata Protection Act
.
State
two
ways in which the sports centre staff could breach the Data
Protection Act.
(
d
)
Each membership card requires 1·6 Megabytes of storage.
Calculate the storage requirements for 1,500 membership cards in Gigabytes.
s
how all working.
(
e
)

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The centre’s gym has a variety of exercise bikes. Each bike is programmed to
calculate the average speed reached over a minute.
(i)
State the
standard algorithm
used to find the highest average speed for the
cyclist.
(ii)
The program has been updated to monitor the cyclist’s heart rate.
Name the stage of the software development process that has been
carried out.
(iii)
A new customer has problems when controlling the program options.
Name the documentation that this customer should refer to.
(iv)
The documentation can be downloaded from the Internet as a standard
file format.
Explain why standard file formats are used in this situation.
14.
A supermarket chain, Tesda, allows customers to use self service tills.
(
a
)
The customer uses a device to capture an item’s barcode.
Name this device.
(
b
)
As the customer adds items to a bag, a program calculates the total weight of
the bag. If this bag weighs more than 5
kg a beeping sound is made.
(i)
State the device that produces this sound.
(ii)
Part of the algorithm used to generate the beeping sound is shown below:
2.1
repeat
2.2
add item weight to total weight
2.3
if total weight >5 then
2.4
start beeping noise
2.5
endif
2.6
until no more items
Name the type of loop used in the algorithm above.

(continued)
(
c
)
The store manager wants a program to calculate when a 2 for 1 promotion
should be made available to shoppers. A promotion is offered when the
following conditions are met:
• 300
items
or
more
are
left
in
stock
• remaining
days
are
less
than
10
days
Part of the algorithm is shown below:
3.1
let remaining days
=
sell by date – todays date
3.2
if
then
3.3
start 2 for 1 promotion
3.4
endif
(i)
Complete step 3.2 of the algorithm.
(ii)
Pseudocode is the design notation used above.
State
one
graphical design notation
that could have been used.
(
d
)
The supermarket tills are connected to a powerful computer system which
processes all the supermarket’s data.
(i)
Name the type of computer system used.
(ii)
State the most appropriate backing storage device that could be used to
access this data quickly.
(
e
)
State
two
benefits to Tesda of networking their computer systems across the
country.

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