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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS
Cambridge ICT Starters
*0123456789*
4293/B
ON TRACK
Stage 2: Control for a Purpose
2012
Maximum time allowed: 1 hour 30 minutes
No Additional Materials are required.
READ THESE INSTRUCTIONS FIRST
Write your Centre number, candidate number and name on all the work you hand in.
For Tutor Use
Control for a Purpose
Candidate was able to:
Pass/
Merit
Design a control system
P
Build a sequence of events to activate
multiple devices concurrently
P
Correct and improve procedures
M
Evaluate the system, identifying
limitations
M
Please
tick
Tutors also need to complete and sign the
Learning Objectives Record Sheet for each Candidate.
This document consists of 5 printed pages.
IB12 01_4293_01B/RP
© UCLES 2012
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2
Centre Number
Candidate Number
Name
On Track – Stage 2 – Control for a Purpose
Section A
A new sports stadium is being built for the next Olympics. It will have an automatic
entry gate. The entry gate will open when tickets are put into a slot. The entry gate will
open for the ticket holder only. The entry gate will shut when that person has passed
through. Lights will show when people can enter and the barrier is reset.
1
Design a control system that will work the entry gate.
(a) What input device(s) will be needed?
(b) What output device(s) will be needed?
(c) Complete the table for the entry gate control system using these symbols. The
table should show each stage of your design. Not all symbols need to be used.
Start
© UCLES 2012
Input
Output
Process
Subroutine
4293/01/B/J/12
Decision
Stop
3
Centre Number
Candidate Number
Name
On Track – Stage 2 – Control for a Purpose
Description of the event
in ordinary words
Begin the entry gate control process
Control words
Start
Is Input 1 on?
Flowchart symbol
Start
Decision
(LO1)
2
Construct the flowchart in appropriate software and test your control system. Type
your name onto the flowchart in a text box. Save the file as YourName and Print.
(LO2)
© UCLES 2012
4293/01/B/J/12
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4
Centre Number
Candidate Number
Name
On Track – Stage 2 – Control for a Purpose
Section B
In this section you are going to correct any problems and improve the control system
that you created in Section A. For health and safety reasons, the number of people
allowed in the stadium must be limited.
1
Test your control system. Write any problems that you have found. If there are no
problems, explain why you consider that your system works well.
2
Make changes to your control system to correct any problems and improve its
working. Save your flowchart as YourName2 Print this flowchart.
3
Retest your control system and make any further changes needed. Save your
flowchart as YourName3 Print this flowchart.
(LO3)
© UCLES 2012
4293/01/B/J/12
5
Centre Number
Candidate Number
Name
On Track – Stage 2 – Control for a Purpose
4
What are the limitations of the control system that you have designed compared
with a real stadium with automatic gates?
(LO4)
Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every
reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the
publisher will be pleased to make amends at the earliest possible opportunity.
University of Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of
Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge.
© UCLES 2012
4293/01/B/J/12
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