55. AQA GCSE (8525) SLR9 – 3.2 String manipulation

What is string manipulation?

• A method to change the length of an array

• The process of manipulating, extracting, or changing characters in a string variable

• The act of changing the characters in a number variable

• The technique to manipulate integers and floats

Answer explanation

String manipulation is the process of manipulating, extracting, or changing characters in a string variable.

In the example of an online form, what string manipulation is required for names?

• Converting the entire name to uppercase

• Extracting the first letter to make it lowercase

• Splitting the first name and last name into two variables

• Making the first letter uppercase and the rest lowercase

Answer explanation

The correct string manipulation required for names is making the first letter uppercase and the rest lowercase.

What is text parsing in the context of a search engine?

• Converting text into a non-readable format

• Manipulating strings to provide a sensible output

• Encrypting the search query

• Deleting unnecessary characters from the string

Answer explanation

Text parsing in the context of a search engine involves manipulating strings to provide a sensible output, such as extracting relevant information from the text.

Why might train station names need to be abbreviated?

• To save storage space in the database

• To fit them on a printed ticket

• To make them easier to remember

• To make them look more appealing

Answer explanation

Train station names might need to be abbreviated to fit them on a printed ticket, ensuring all necessary information is displayed clearly.

What does AQA require for the exam in terms of string manipulation?

• Knowledge of hardware components

• Understanding of string manipulation commands in a high-level language

• Ability to draw flowcharts

• Proficiency in spreadsheet formulas

Answer explanation

The correct answer is the understanding of string manipulation commands in a high-level language, as required by AQA for the exam.

What are string functions described as in the context of programming languages?

• External libraries needed to be installed

• Commands that only work in low-level programming

• Subroutines built into the programming language to manipulate the string datatype

• Variables that store text

Answer explanation

String functions are subroutines built into the programming language to manipulate the string datatype.

How are parameters passed to subroutines in pseudocode according to AQA?

• Without any brackets

• In parentheses

• In curly braces

• In square brackets

Answer explanation

Parameters are passed to subroutines in pseudocode in parentheses according to AQA.

What is the result of the string manipulation command 'LENGTH' when applied to 'Hello'?

• 4

• 5

• 6

• The program crashes

Answer explanation

The correct answer is 5 because the 'LENGTH' command returns the number of characters in a string, and 'Hello' has 5 characters.

Which programming languages are commonly supported by AQA for the GCSE exams?

• PHP, Perl, and Go

• Python, Visual Basic, and C#

• Java, C++, and Python

• JavaScript, Ruby, and Swift

Answer explanation

AQA commonly supports Python, Visual Basic, and C# for the GCSE exams.

What is known as 'slicing' in Python?

• Deleting parts of a string

• Converting a string to uppercase

• Extracting a part of a string

• Cutting a string into multiple parts

Answer explanation

Slicing in Python refers to extracting a part of a string, not deleting, converting to uppercase, or cutting into multiple parts.