WJEC Computer Science KO - Algorithms 1

What is an algorithm?

• A) A complex mathematical equation

• B) A set of instructions in programming to solve a given problem

• C) A type of computer hardware

• D) A programming language

Which of the following is an example of pseudo code for declaring a subroutine?

• A) if counter = 1

• B) Declare CapitalLetterOfName

• C) myvariable is integer

• D) output "Please enter a number."

What is the purpose of indentation in pseudo code?

• A) To define a new data type

• B) To declare a variable

• C) To make the structure of the code clear

• D) To perform an assignment operation

Which of the following is NOT a data type listed in the specification?

• A) boolean

• B) float

• C) string

• D) integer

What is the purpose of a selection statement in an algorithm?

• A) To repeat a set of instructions

• B) To perform an assignment to a variable

• C) To decide between different options based on a condition

• D) To declare a subroutine

What is the correct syntax for a repetition structure in pseudo code that repeats until a certain condition is met?

• A) for ... next i

• B) if ... else

• C) repeat ... until

• D) set counter = 0

What is a rogue value in the context of loops?

• A) A value that increments the counter

• B) A value that starts the loop

• C) A value that falls outside the range of possible values for the data being processed

• D) A value that is used to define a variable

What is the purpose of the 'mid' command in string handling?

• To discover the contents of all or part of a string

• To replace one part of a string with another

• To concatenate two strings together

• To sort a list of strings

What does the 'replace' command do in string handling?

• It combines two strings with or without additional text

• It sorts a list of strings in an ordered sequence

• It searches for a specific item in a string

• It is used to replace part of a string

What is concatenation in the context of string handling?

• Finding the length of a string

• Replacing part of a string with another

• The process of combining a string with text or combining two strings with or without additional text

• Sorting a list of strings in an ordered sequence