Oxford AQA International A-level · Computer Science (9645)

Abstraction and decomposition: Practice Questions

5 multiple-choice questions marked as you go, and 5 written questions with worked solutions. All on Abstraction and decomposition.

10 questions24 marksFree, no account

Question 1

1 mark

Which of the following best defines the term decomposition as it relates to program design?

Question 2

1 mark

In the context of software engineering, which of the following best describes the relationship between decomposition and modularised programming?

Question 3

1 mark

In top-down design, the process of stepwise refinement is most closely associated with which concept?

Question 4

1 mark

What is the primary purpose of abstraction in programming?

Question 5

1 mark

Consider the task of creating a self-driving car system. The process of deciding that the system needs a 'Route Planning' module, a 'Sensor Input' module, and a 'Steering Control' module exemplifies:

Question 6

2 marks

Define the term abstraction in the context of program design.

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Question 7

3 marks

In programming, how is the concept of decomposition typically achieved to break a large problem down into manageable sub-problems?

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Question 8

5 marks

Explain how the principle of decomposition allows a large software project to be developed simultaneously by multiple programmers without causing functional conflicts.

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Question 9

2 marks

Explain the difference between Abstraction and Decomposition when solving a complex computational problem.

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Question 10

7 marks

A large logistics company needs a system to schedule and manage thousands of deliveries daily. This complex task requires careful program design.

(a) Describe how the principles of abstraction would be applied when designing the software for this logistics management system.

(b) Using decomposition, identify three major, independent modules required for the system. For one of these modules, suggest two necessary subroutines and describe their specific purpose.

(c) Explain how the use of local variables within the subroutines suggested in part (b) supports good programming practice and maintains modularity.

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