A-LEVEL AQA COMPUTER SCIENCE
QUESTIONS WITH DETAILED AND
VERIFIED ANSWERS 100% GUARANTEE
PASS A+
QUESTIONIrrational (Number) - answer-Any number that cannot be represented as a fraction.
Examples: square root of 2, PI.
QUESTIONReal (Number) - answer-Any number that can either be rational or irrational.
QUESTIONBoolean - answer-A value that is either true or false.
QUESTIONString - answer-A series of characters.
QUESTIONArray - answer-A variable that can store multiple values of the same data type.
Example: Storing the high-scores of a game as integers.
QUESTIONRecord - 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.
,Baud Rate - answer-The maximum possible number of signal changes that can occur in a wire per second.
QUESTIONBit Rate - answer-The number of bits that can be sent down a wire per second.
QUESTIONInteger - answer-A whole number that can be positive, negative or zero.
Examples: -3, 0, 7, 2013588.
QUESTIONNatural (Number) - answer-A whole number that is either positive or zero.
Examples: 0, 1, 2, 100, 67238.
QUESTIONRational (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.
QUESTIONVariable - 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.
QUESTIONConstant - 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.
QUESTIONSubroutine - answer-This can be broken down into procedures and functions.
, QUESTIONProcedure - answer-A block of code that performs a specific task that does not return a value.
Parameters can be passed into it.
.
QUESTIONOR - answer-Logical Operation:
Returns true as long as at least one of the values are true.
QUESTIONXOR - answer-Logical Operation:
Returns true only when exactly one of the two values is true and not both.
QUESTIONNOT - answer-Logical Operation:
Returns true if the value is false and returns false if the value is true.
QUESTIONException Handling - answer-When a try catch is used in the program to deal with any errors
that may occur.
QUESTIONByVal - answer-When a variable is passed into a subroutine as a copy so its value will not be
changed.
QUESTIONByRef - answer-When a variable is passed into a subroutine as a reference so its value can be
changed.
QUESTIONLocal (Variable) - answer-A variable that is defined, for example, within a subroutine and cannot
be viewed or modified from outside of the block of code is was declared in.
QUESTIONGlobal (Variable) - answer-A variable that is declared, usually at the start of the program, and
can be accessed and modified from anywhere at all in the program.
QUESTIONS WITH DETAILED AND
VERIFIED ANSWERS 100% GUARANTEE
PASS A+
QUESTIONIrrational (Number) - answer-Any number that cannot be represented as a fraction.
Examples: square root of 2, PI.
QUESTIONReal (Number) - answer-Any number that can either be rational or irrational.
QUESTIONBoolean - answer-A value that is either true or false.
QUESTIONString - answer-A series of characters.
QUESTIONArray - answer-A variable that can store multiple values of the same data type.
Example: Storing the high-scores of a game as integers.
QUESTIONRecord - 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.
,Baud Rate - answer-The maximum possible number of signal changes that can occur in a wire per second.
QUESTIONBit Rate - answer-The number of bits that can be sent down a wire per second.
QUESTIONInteger - answer-A whole number that can be positive, negative or zero.
Examples: -3, 0, 7, 2013588.
QUESTIONNatural (Number) - answer-A whole number that is either positive or zero.
Examples: 0, 1, 2, 100, 67238.
QUESTIONRational (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.
QUESTIONVariable - 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.
QUESTIONConstant - 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.
QUESTIONSubroutine - answer-This can be broken down into procedures and functions.
, QUESTIONProcedure - answer-A block of code that performs a specific task that does not return a value.
Parameters can be passed into it.
.
QUESTIONOR - answer-Logical Operation:
Returns true as long as at least one of the values are true.
QUESTIONXOR - answer-Logical Operation:
Returns true only when exactly one of the two values is true and not both.
QUESTIONNOT - answer-Logical Operation:
Returns true if the value is false and returns false if the value is true.
QUESTIONException Handling - answer-When a try catch is used in the program to deal with any errors
that may occur.
QUESTIONByVal - answer-When a variable is passed into a subroutine as a copy so its value will not be
changed.
QUESTIONByRef - answer-When a variable is passed into a subroutine as a reference so its value can be
changed.
QUESTIONLocal (Variable) - answer-A variable that is defined, for example, within a subroutine and cannot
be viewed or modified from outside of the block of code is was declared in.
QUESTIONGlobal (Variable) - answer-A variable that is declared, usually at the start of the program, and
can be accessed and modified from anywhere at all in the program.
