N5 Computer Systems exam questions

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​A - 153

Open Ended

The data usage for the customer in May is 35.7 GB. This value would be stored in a computer system using floating-point representation as shown below.  

 

0.357 × 10²  

 

Identify the mantissa and exponent in the above floating-point representation.

Open Ended

The cruising speed of an aeroplane is 891.6 kilometres per hour. This value would be stored in a computer system using floating-point representation as shown below.  

 

0·8916 × 10³  

 

Identify the mantissa and exponent in the above floating-point representation. (2) 

Multiple Choice

How many bits does extended ASCII use to represent a character?

• 4

• 7

• 8

• 16

Multiple Choice

A vector graphics package is used to create a floor plan for a house as shown below. State the object used to create the outline of the sink. (1)

• Rectangle

• Straight line

• Polygon

• Ellipse

• Circle

Fill in the Blanks

Fill in the Blanks

Fill in the Blanks

Open Ended

Describe how a bit-mapped graphic is represented in a computer system’s memory. (2)

Multiple Choice

State the part of the processor that will compare a selected stored word with an input from the keyboard. (1)

• Arithmetic & Logic Unit

• Control Unit

• Registers

• RAM

Multiple Choice

State the bus used to transfer the stored water temperature to the processor. (1)

• Address bus

• Data bus

Open Ended

Explain how a computer system organises data in memory so that it can be retrieved. (2)

Open Ended

A school wants to reduce the energy consumption of the computing department. Pupils are already encouraged to put the computers into standby mode when not in use.

 Describe two other methods to reduce the energy consumption of the computers. (2)

Open Ended

Describe one way that Sam could reduce the energy consumption of the tablet. (1)

Open Ended

The app will store passenger information. State how this information could be transferred securely from the app to the computers running the booking system. (1)

Open Ended

Explain why encryption is used when sending emails across wireless networks. (1)