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20.1. Programming Paradigms
A subsection of Computer Science, 9618, through 20. Further Programming
Listing 9 of 9 questions
A program is to be written using Object-Oriented Programming (OOP) for a shop that sells knitting yarn. There are three types of yarn: acrylic, wool or mix. The following data are stored for each type. • Name • Colour • Batch code • Weight • Number of balls of yarn in stock (can be edited) • Type of yarn The following statements apply to yarn. • Acrylic can be soft or not soft. • Wool can be lamb, merino or alpaca. • Mix contains a percentage of acrylic. Each type of yarn has a method that will display all the information about the yarn. Complete this class inheritance diagram to show the properties, methods and inheritance. Yarn Name: STRING Colour: STRING BatchCode: STRING Weight: INTEGER NumberBalls: INTEGER Type: STRING Constructor() EditNumberBalls() YarnInfo() Acrylic Wool Mix Percentage: INTEGER Constructor() YarnInfo() Constructor() Constructor() Describe what is meant by the terms properties, methods and inheritance. Properties Methods Inheritance
9618_s22_qp_31
THEORY
2022
Paper 3, Variant 1
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A program is to be written using Object-Oriented Programming (OOP) for a shop that sells knitting yarn. There are three types of yarn: acrylic, wool or mix. The following data are stored for each type. • Name • Colour • Batch code • Weight • Number of balls of yarn in stock (can be edited) • Type of yarn The following statements apply to yarn. • Acrylic can be soft or not soft. • Wool can be lamb, merino or alpaca. • Mix contains a percentage of acrylic. Each type of yarn has a method that will display all the information about the yarn. Complete this class inheritance diagram to show the properties, methods and inheritance. Yarn Name: STRING Colour: STRING BatchCode: STRING Weight: INTEGER NumberBalls: INTEGER Type: STRING Constructor() EditNumberBalls() YarnInfo() Acrylic Wool Mix Percentage: INTEGER Constructor() YarnInfo() Constructor() Constructor() Describe what is meant by the terms properties, methods and inheritance. Properties Methods Inheritance
9618_s22_qp_33
THEORY
2022
Paper 3, Variant 3
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Define these Object-Oriented Programming (OOP) terms: Instance Inheritance Polymorphism In OOP, a class contains attributes and methods. Complete the pseudocode for the class Car to enable objects to be created. The class needs to include: • string attributes to store the make, model, body type and fuel type • an integer attribute to store the number of cars of that type built. The attributes must be available only through the methods of the class. CLASS PRIVATE Make : STRING PRIVATE PUBLIC PROCEDURE New(CarMake : STRING, , ) Make ← Model ← BodyType ← CarBodyType Fuel ← "" NumberBuilt ← 0 ENDPROCEDURE GetFuel() GetNumberBuilt()
9618_w22_qp_31
THEORY
2022
Paper 3, Variant 1
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Define these Object-Oriented Programming (OOP) terms: Encapsulation Getter Setter A school has a program written using OOP to maintain its staff and student records. The object SubstituteTeacher allows the details of the school’s substitute teachers to be stored. This includes their full name, telephone number and whether or not they are in school today. For example: SubName Sarah Jones Telephone InSchool TRUE Complete the diagram for the object SubstituteTeacher, including appropriate properties and their getters and setters. SubstituteTeacher SubName : STRING InSchool : BOOLEAN SetTelephone(Tel : STRING) GetSubName()
9618_w22_qp_32
THEORY
2022
Paper 3, Variant 2
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Define these Object-Oriented Programming (OOP) terms: Instance Inheritance Polymorphism In OOP, a class contains attributes and methods. Complete the pseudocode for the class Car to enable objects to be created. The class needs to include: • string attributes to store the make, model, body type and fuel type • an integer attribute to store the number of cars of that type built. The attributes must be available only through the methods of the class. CLASS PRIVATE Make : STRING PRIVATE PUBLIC PROCEDURE New(CarMake : STRING, , ) Make ← Model ← BodyType ← CarBodyType Fuel ← "" NumberBuilt ← 0 ENDPROCEDURE GetFuel() GetNumberBuilt()
9618_w22_qp_33
THEORY
2022
Paper 3, Variant 3
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Questions Discovered
9