AQA A Level · Computer Science 7517

Programming paradigms and object-oriented programming: Practice Questions

5 multiple-choice questions marked as you go, and 5 written questions with worked solutions. All on Programming paradigms and object-oriented programming.

10 questions25 marksFree, no account

Question 1

1 mark

In Unified Modelling Language (UML) class diagrams, which symbol is used to represent composition?

Question 2

1 mark

In a procedural-oriented approach to program design, what tool is primarily used to show the relationship between a main module and its sub-modules?

Question 3

1 mark

Consider the relationship between a University class and a Department class. If the Department cannot exist without the University, and the destruction of the University results in the destruction of all its Departments, how is this relationship represented in a UML class diagram?

Question 4

1 mark

What does a white diamond line represent in a Unified Modelling Language (UML) class diagram?

Question 5

1 mark

In the context of Object-Oriented Programming (OOP) design principles, which of the following best describes the concept of "programming to an interface, not an implementation"?

Question 6

2 marks

In a Unified Modelling Language (UML) class diagram, how are composition and aggregation visually distinguished?

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Question 7

3 marks

Explain the fundamental difference between composition and aggregation when modeling relationships between objects in OOP.

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Question 8

5 marks

Explain the design principle "favour composition over inheritance" and why it is often recommended in OOP.

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Question 9

6 marks

A software developer is comparing different programming paradigms for a new project.

(a) State the three basic combining principles that are fundamental to all imperative programming languages.

(b) In the context of Object-Oriented Programming (OOP), explain the difference between aggregation and composition with reference to the lifecycle of the objects involved.

(c) In a UML class diagram, identify the specific symbol used to represent a composition relationship.

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Question 10

4 marks

Object-oriented programming (OOP) uses several key concepts to manage complexity.

(a) Explain the relationship between a class and an object.
(b) Define encapsulation and explain how it is implemented in a class using access specifiers.

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