AQA A LEVEL COMPUTER SCIENCE
7517 BUNDLE 2026 COMPLETE EXAM
PAPERS AND VERIFIED ANSWERS
WITH MARK SCHEMES GRADED A+
◉ Bit Rate. Answer: The number of bits that can be sent down a wire
per second.
◉ Integer. Answer: A whole number that can be positive, negative or
zero.
Examples: -3, 0, 7, 2013588.
◉ Natural (Number). Answer: A whole number that is either positive or
zero.
Examples: 0, 1, 2, 100, 67238.
◉ Rational (Number). Answer: Any number that can be represented as
the fraction 'a/b' where 'a' and 'b' are both integers.
Examples: -0.2, 4/5, 1, 1/3.
,◉ Irrational (Number). Answer: Any number that cannot be represented
as a fraction.
Examples: square root of 2, PI.
◉ Real (Number). Answer: Any number that can either be rational or
irrational.
◉ Boolean. Answer: A value that is either true or false.
◉ String. Answer: A series of characters.
◉ Array. Answer: A variable that can store multiple values of the same
data type.
Example: Storing the high-scores of a game as integers.
◉ Record. Answer: A variable that can store multiple values that can
have different data types.
Example: Storing data about a book; a string for the title, an integer for
the number of pages, etc.
,◉ Variable. Answer: A metaphor for it is that is a box that can store a
specific type of item (the data type) and has a name assigned to it (the
identifier). Its value can be changed during run-time of the program.
◉ Constant. Answer: A metaphor for it is that is a box that can store a
specific type of item (the data type) and has a name assigned to it (the
identifier). Its value cannot be changed during run-time of the program.
◉ Subroutine. Answer: This can be broken down into procedures and
functions.
◉ Procedure. Answer: A block of code that performs a specific task that
does not return a value. Parameters can be passed into it.
◉ Function. Answer: A block of code that performs a specific task that
returns a value. Parameters can be passed into it.
◉ Selection. Answer: This is when an if statement or select case is used
to, for example, check the value of a variable.
◉ Iteration. Answer: This is when, within the program, there is a loop.
◉ Definite Iteration. Answer: The number of times that the program will
loop is already specified.
Example: For loop.
, ◉ Indefinite Iteration. Answer: The number of times the program will
loop is unknown.
Example: Do loop.
◉ Nested (structures). Answer: This is when either iterative or selective
statements are put inside of each other.
◉ Meaningful Identifiers. Answer: Subroutines, variables and objects
should have sensible names.
◉ Real Division. Answer: Finds the value (usually as a decimal) of one
number divided by another.
◉ Integer Division. Answer: Finds the integer part of one number
divided by another.
◉ Integer Remainder. Answer: Finds the remainder of one number
divided by another.
◉ Truncation. Answer: Chops the decimal part off a number.
◉ Floor. Answer: Rounds a number down to the nearest integer.
7517 BUNDLE 2026 COMPLETE EXAM
PAPERS AND VERIFIED ANSWERS
WITH MARK SCHEMES GRADED A+
◉ Bit Rate. Answer: The number of bits that can be sent down a wire
per second.
◉ Integer. Answer: A whole number that can be positive, negative or
zero.
Examples: -3, 0, 7, 2013588.
◉ Natural (Number). Answer: A whole number that is either positive or
zero.
Examples: 0, 1, 2, 100, 67238.
◉ Rational (Number). Answer: Any number that can be represented as
the fraction 'a/b' where 'a' and 'b' are both integers.
Examples: -0.2, 4/5, 1, 1/3.
,◉ Irrational (Number). Answer: Any number that cannot be represented
as a fraction.
Examples: square root of 2, PI.
◉ Real (Number). Answer: Any number that can either be rational or
irrational.
◉ Boolean. Answer: A value that is either true or false.
◉ String. Answer: A series of characters.
◉ Array. Answer: A variable that can store multiple values of the same
data type.
Example: Storing the high-scores of a game as integers.
◉ Record. Answer: A variable that can store multiple values that can
have different data types.
Example: Storing data about a book; a string for the title, an integer for
the number of pages, etc.
,◉ Variable. Answer: A metaphor for it is that is a box that can store a
specific type of item (the data type) and has a name assigned to it (the
identifier). Its value can be changed during run-time of the program.
◉ Constant. Answer: A metaphor for it is that is a box that can store a
specific type of item (the data type) and has a name assigned to it (the
identifier). Its value cannot be changed during run-time of the program.
◉ Subroutine. Answer: This can be broken down into procedures and
functions.
◉ Procedure. Answer: A block of code that performs a specific task that
does not return a value. Parameters can be passed into it.
◉ Function. Answer: A block of code that performs a specific task that
returns a value. Parameters can be passed into it.
◉ Selection. Answer: This is when an if statement or select case is used
to, for example, check the value of a variable.
◉ Iteration. Answer: This is when, within the program, there is a loop.
◉ Definite Iteration. Answer: The number of times that the program will
loop is already specified.
Example: For loop.
, ◉ Indefinite Iteration. Answer: The number of times the program will
loop is unknown.
Example: Do loop.
◉ Nested (structures). Answer: This is when either iterative or selective
statements are put inside of each other.
◉ Meaningful Identifiers. Answer: Subroutines, variables and objects
should have sensible names.
◉ Real Division. Answer: Finds the value (usually as a decimal) of one
number divided by another.
◉ Integer Division. Answer: Finds the integer part of one number
divided by another.
◉ Integer Remainder. Answer: Finds the remainder of one number
divided by another.
◉ Truncation. Answer: Chops the decimal part off a number.
◉ Floor. Answer: Rounds a number down to the nearest integer.
