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Question 263 - CTFL4 discussion

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You are testing a system that is used in motor vehicles to warn the driver of an obstacle when re-versing. Output is provided by a series of LED lights (green, yellow, and red), each illuminated based on clearly defined conditions.

The following summary describes the functionality:

* Object within 10 metres, green LED lit.

* Object within 5 metres, yellow LED lit.

* Object within 1 metre, red LED lit.

* Setting sensitivity mode to 'ON' will result in only the red LED being lit when the object is within 1 metre.

The following decision table describes the rules associated with the functioning of this proximity warning system:

Which intended functionality is tested by Rule 5 in the decision table?

A.
Object is within 5 metres of the vehicle and the sensitivity mode is switched 'off', resulting in the yellow LED being lit.
Answers
A.
Object is within 5 metres of the vehicle and the sensitivity mode is switched 'off', resulting in the yellow LED being lit.
B.
Object is within 5 metres of the vehicle and the sensitivity mode is switched 'on', resulting in the yellow LED being lit.
Answers
B.
Object is within 5 metres of the vehicle and the sensitivity mode is switched 'on', resulting in the yellow LED being lit.
C.
Object is within 5 metres of the vehicle and the sensitivity mode is switched 'off', resulting in no LED being lit.
Answers
C.
Object is within 5 metres of the vehicle and the sensitivity mode is switched 'off', resulting in no LED being lit.
D.
Object is within 5 metres of the vehicle and the sensitivity mode is switched 'on', resulting in no LED being lit.
Answers
D.
Object is within 5 metres of the vehicle and the sensitivity mode is switched 'on', resulting in no LED being lit.
Suggested answer: D

Explanation:

Rule 5 in the decision table indicates that when the object is within 5 metres of the vehicle and the sensitivity mode is switched 'on', no LED is lit. This matches the conditions and actions described in the decision table provided, ensuring that only the red LED is lit when the sensitivity mode is on and the object is within 1 metre, otherwise no LED is lit .

asked 18/09/2024
Susanne Hughes
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