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There are a variety of controls that can prevent or minimise the effects of computer failure.Explain two of these controls.

QUESTION ONE
a)State five hardware evaluation factors. (5 marks)
b)Because of variation in the characteristics of computer systems,coputers can be classified b;the data manipulated,the purpose for which they are designed,or on the basis of price,size and capability.Explain the data manipulation category. (15 marks)

QUESTION TWO.
b)State five utility or service programs. (10 marks)

QUESTION THREE
a)There are a variety of controls that can prevent or minimise the effects of computer failure.Explain two of these controls. (10 marks)
b)With reference to system development,describe two characteristics of a good questionnaire. (10 marks)

 

 

 

 

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The following data refers to a vehicle: Mass of the vehicle=1600kg Number of wheels =4 Moment of inertia of each wheel=3.2kgm2 Diameter of each wheel=650mm Mass of engine rotating parts=60kg Radius of gyration of engine rotating parts=90mm Transmission efficiency=85% Gear ration from engine to back axle=6 The resistance to motion is given by (180 + 0.84V2) and the engine torque available is given by (90 – 0.048V2), where V is the linear speed of the vehicle in m/s. Determine: The power of the vehicle when velocity is 18m/s.(11 marks) The time taken for the vehicle to increase speed from 18m/s to 24 m/s.(5 marks)

May 18, 2016 7:46 pm
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