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- State the name of an identifier for:
- An attribute in the Household class that would not be instantiated for each new object [1]
- A subroutine in the Settlement class that accepts parameters by reference [1]
- A subclass [1]
- A local variable that is used to return a Boolean [1]
- TWO subroutines from the Company class that cannot be called from outside the Company class [2]
- A library string function called from the GetIndexOfCompany subroutine in the Simulation class [1]
- A collection attribute in the Company class [1]
- An instance of Settlement [1]
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- Showing and explaining your working, give the probability of a call to ProcessCostOfFuelChangeEvent being made from the DisplayEventsAtDayEnd subroutine in the Simulation class. [3]
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- Explain how validation might be added to the OpenOutlet subroutine of the Company class to prevent a new outlet being created beyond the bounds of the settlement. [3]
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- Each Household object is stored within a ArrayList called Households. Describe how a Dictionary could have been used instead to store Household objects. [3]
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- Describe in full how the GetDistanceBetweenTwoOutlets subroutine of the Company class calculates the distance between two outlets. [4]
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- Explain the role of the object of type Random in the Household class. [2]
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- Explain the role of the variable upOrDown in the ProcessCostOfFuelChangeEvent subroutine of the Simulation class. [3]
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- In the Simulation constructor, the integer literals 100000, 200 and 203 are passed to the Company constructor when creating the ‘AQA Burgers’ company. State the role of each of these integer literals. [3]
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- Describe in full the operation of the GetIndexOfCompany subroutine in the Simulation class. [5]
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- Describe the circumstances under which the ModifyCompany subroutine of the Simulation class would output the text ‘Invalid coordinates’. [3]
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- Currently, a call to the LargeSettlement constructor could not result in a settlement that is smaller than 1,000 by 1,000. This is true even if negative numbers are entered by the user when prompted for additional x and y values. Explain how a call to the LargeSettlement constructor never results in a smaller settlement size. [3]
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- Describe the concept of constructor overloading, and explain how constructor overloading could have been used instead of inheritance for the creation of a new large settlement. [4]
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- Copy and complete the following hierarchy chart for part of the Simulation class of the Skeleton Program.
You should not include calls to any library subroutines. [3]
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- Describe how the program would respond to a call to the Company constructor using a category that is neither ‘fast food’, ‘family’ nor ‘named chef’. [2]
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