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Cambridge IGCSE Computer Science practice

Paper 2 structured question: P rogramming concepts

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P rogramming concepts

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Paper 2Algorithms, Programming and Logic1 marks

Understanding the use of functions and procedures in programming.

Description

Functions and Procedures

In a programming language, a function named 'calculateArea' takes two parameters: 'length' and 'width'. It returns the area calculated as length multiplied by width. A procedure named 'displayMessage' takes one parameter 'message' and prints it to the console.

  1. a

    State the difference between a function and a procedure.

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 2 structured question: P rogramming concepts

Paper 2Algorithms, Programming and Logic3 marks

Description

Variable Scope

Consider the following code snippet: 'globalVar = 10; function example() { localVar = 5; }'. Identify the scopes of 'globalVar' and 'localVar'.

  1. a

    Explain the scope of 'globalVar'.

    Aim for approximately 1 distinct marking point.

    [1]
  2. b

    Explain the scope of 'localVar'.

    Aim for approximately 2 distinct marking points.

    [2]