AQA A-LEVEL COMPUTER SCIENCE Paper 2
PRACTICE Exam with QUESTIONS AND
DETAILED ANSWERS ||latest
2025/2026||BRAND NEW VERSION!!!!!
Baud Rate - CORRECTANSWERThe maximum possible number of signal changes that can occur
in a wire per second.
Bit Rate - CORRECTANSWERThe number of bits that can be sent down a wire per second.
Integer - CORRECTANSWERA whole number that can be positive, negative or zero.
Examples: -3, 0, 7, 2013588.
Natural (Number) - CORRECTANSWERA whole number that is either positive or zero.
Examples: 0, 1, 2, 100, 67238.
Rational (Number) - CORRECTANSWERAny 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) - CORRECTANSWERAny number that cannot be represented as a fraction.
Examples: square root of 2, PI.
Real (Number) - CORRECTANSWERAny number that can either be rational or irrational.
Boolean - CORRECTANSWERA value that is either true or false.
String - CORRECTANSWERA series of characters.
Array - CORRECTANSWERA variable that can store multiple values of the same data type.
Example: Storing the high-scores of a game as integers.
Record - CORRECTANSWERA 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 - CORRECTANSWERA 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 - CORRECTANSWERA 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 - CORRECTANSWERThis can be broken down into procedures and functions.
Procedure - CORRECTANSWERA block of code that performs a specific task that does not return
a value. Parameters can be passed into it.
Function - CORRECTANSWERA block of code that performs a specific task that returns a value.
Parameters can be passed into it.
Selection - CORRECTANSWERThis is when an if statement or select case is used to, for example,
check the value of a variable.
Iteration - CORRECTANSWERThis is when, within the program, there is a loop.
Definite Iteration - CORRECTANSWERThe number of times that the program will loop is already
specified.
Example: For loop.
Indefinite Iteration - CORRECTANSWERThe number of times the program will loop is unknown.
Example: Do loop.
Nested (structures) - CORRECTANSWERThis is when either iterative or selective statements are
put inside of each other.
Meaningful Identifiers - CORRECTANSWERSubroutines, variables and objects should have
sensible names.
, Real Division - CORRECTANSWERFinds the value (usually as a decimal) of one number divided by
another.
Integer Division - CORRECTANSWERFinds the integer part of one number divided by another.
Integer Remainder - CORRECTANSWERFinds the remainder of one number divided by another.
Truncation - CORRECTANSWERChops the decimal part off a number.
Floor - CORRECTANSWERRounds a number down to the nearest integer.
Ceiling - CORRECTANSWERRounds a number up to the nearest integer.
AND - CORRECTANSWERLogical Operation:
Returns true only when both values are true.
OR - CORRECTANSWERLogical Operation:
Returns true as long as at least one of the values are true.
XOR - CORRECTANSWERLogical Operation:
Returns true only when exactly one of the two values is true and not both.
NOT - CORRECTANSWERLogical Operation:
Returns true if the value is false and returns false if the value is true.
PRACTICE Exam with QUESTIONS AND
DETAILED ANSWERS ||latest
2025/2026||BRAND NEW VERSION!!!!!
Baud Rate - CORRECTANSWERThe maximum possible number of signal changes that can occur
in a wire per second.
Bit Rate - CORRECTANSWERThe number of bits that can be sent down a wire per second.
Integer - CORRECTANSWERA whole number that can be positive, negative or zero.
Examples: -3, 0, 7, 2013588.
Natural (Number) - CORRECTANSWERA whole number that is either positive or zero.
Examples: 0, 1, 2, 100, 67238.
Rational (Number) - CORRECTANSWERAny 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) - CORRECTANSWERAny number that cannot be represented as a fraction.
Examples: square root of 2, PI.
Real (Number) - CORRECTANSWERAny number that can either be rational or irrational.
Boolean - CORRECTANSWERA value that is either true or false.
String - CORRECTANSWERA series of characters.
Array - CORRECTANSWERA variable that can store multiple values of the same data type.
Example: Storing the high-scores of a game as integers.
Record - CORRECTANSWERA 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 - CORRECTANSWERA 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 - CORRECTANSWERA 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 - CORRECTANSWERThis can be broken down into procedures and functions.
Procedure - CORRECTANSWERA block of code that performs a specific task that does not return
a value. Parameters can be passed into it.
Function - CORRECTANSWERA block of code that performs a specific task that returns a value.
Parameters can be passed into it.
Selection - CORRECTANSWERThis is when an if statement or select case is used to, for example,
check the value of a variable.
Iteration - CORRECTANSWERThis is when, within the program, there is a loop.
Definite Iteration - CORRECTANSWERThe number of times that the program will loop is already
specified.
Example: For loop.
Indefinite Iteration - CORRECTANSWERThe number of times the program will loop is unknown.
Example: Do loop.
Nested (structures) - CORRECTANSWERThis is when either iterative or selective statements are
put inside of each other.
Meaningful Identifiers - CORRECTANSWERSubroutines, variables and objects should have
sensible names.
, Real Division - CORRECTANSWERFinds the value (usually as a decimal) of one number divided by
another.
Integer Division - CORRECTANSWERFinds the integer part of one number divided by another.
Integer Remainder - CORRECTANSWERFinds the remainder of one number divided by another.
Truncation - CORRECTANSWERChops the decimal part off a number.
Floor - CORRECTANSWERRounds a number down to the nearest integer.
Ceiling - CORRECTANSWERRounds a number up to the nearest integer.
AND - CORRECTANSWERLogical Operation:
Returns true only when both values are true.
OR - CORRECTANSWERLogical Operation:
Returns true as long as at least one of the values are true.
XOR - CORRECTANSWERLogical Operation:
Returns true only when exactly one of the two values is true and not both.
NOT - CORRECTANSWERLogical Operation:
Returns true if the value is false and returns false if the value is true.
