16 printed pages. Dc (RW/SW) 93610/2 ucles 2015 [Turn over Cambridge International Examinations


either    oil pressure >= 3 bar  and



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 either 

 

oil pressure >= 3 bar  and  temperature >= 200°C



 or   

 

oil pressure < 3 bar  and  rotation > 1000 rpm



 or   

 

temperature >= 200°C  and  rotation > 1000 rpm



 (a) 

Draw a logic circuit to represent the above system.



 P

T

X

R

 

[5]




11

9608/11/M/J/15

© UCLES 2015

[Turn over

 (b) 

Complete the truth table for this system.



P

T

R

Workspace

X

0

0

0

0

0

1

0

1

0

0

1

1

1

0

0

1

0

1

1

1

0

1

1

1

 

[4]




12

9608/11/M/J/15

© UCLES 2015

8 (a) 

Explain how the width of the data bus and system clock speed affect the performance of a 

computer system.

Width of the data bus  ................................................................................................................

 ...................................................................................................................................................

 ...................................................................................................................................................

 ...................................................................................................................................................

Clock speed  ..............................................................................................................................

 ...................................................................................................................................................

 ...................................................................................................................................................

 ...............................................................................................................................................[3]

 (b) 

Most computers use Universal Serial Bus (USB) ports to allow the attachment of devices.




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