3.2 Programming

Local Variables (2 marks)

Explain why it is considered good practice to use local variables in subroutines.

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Parameters in Subroutines (3 marks)

Describe how parameters are used to pass data to a subroutine with an example.

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Advantages of Using Subroutines (2 marks)

Discuss two advantages of using subroutines in programming.

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Understanding Subroutines (1 mark)

Explain what is meant by a subroutine in the context of structured programming.

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Random Number Generation (2 marks)

Explain why random number generation is useful in programming a simple game such as ‘guess the number’.

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String Methods: Concatenation (3 mark)

Explain how concatenation of strings works, and give an example using the variables firstName and lastName to create a fullName.

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String Methods: Substring (2 mark)

Given a string variable ‘filePath’ containing the text “C:/User/Docs/Report.docx”, write a statement that uses string handling operations to extract the file extension from ‘filePath’.

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String Methods: Length (1 mark)

Identify the operation that would be used to find the number of characters in a string variable ‘username’.

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Validating Inputs (2 marks)

Explain why it is important for a program to validate user input from the keyboard.

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What is an Input? (1 mark)

Identify what is meant by the term “input” in the context of computer systems.

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