GCSE COMPUTER SCIENCE 9–1
CERTIFICATION EVALUATION EXAMS 2026
QUESTIONS WITH SOLUTIONS GUARANTEED
PASS
◉ Attribute. Answer: an item of data stored about an entity.
◉ Audit trail. Answer: a record of activities that have taken place on
a computer system. This record is generated automatically and will
record what has happened and who or what made the change.
◉ Authentication. Answer: the process of proving to a computer
system who you are (e.g. using a username and password).
◉ Bandwidth. Answer: the amount of data that can be carried on a
network in a given period of time.
◉ Binary. Answer: information represented by only two values (e.g.
a voltage or no voltage, on or off). There are no communication
errors or misunderstandings because there are no small differences.
◉ Binary digit or bit. Answer: the smallest unit of data that is
represented in a computer. it has a single binary value, either 1 or 0.
,◉ Binary prefix. Answer: multiplies a unit by powers of 2.
◉ Binary shift. Answer: an operation done on all the bits of a binary
value in which they are moved by a specific number of places to
either the left or right.
◉ Bit depth. Answer: the number of bits used to encode the
information from each sample. Increasing the number of bits used
increases the amount of detail contained in each sample.
◉ Boolean. Answer: something that can take only the values True or
False; named after English mathematician George Boole.
◉ Brute force. Answer: an algorithm design that does not include
any techniques to improve performance, but instead relies on sheer
computing power to try all possibilities until the solution to a
problem is found.
◉ Built-in functions. Answer: functions that are provided in most
high-level programming languages to perform common tasks.
◉ Bus. Answer: a group of connections between devices in a
computer.
, ◉ Bus width. Answer: the number of wires that make up a bus this
determines the range of binary numbers that can be transmitted.
◉ Byte. Answer: the basic combination of bits used to represent an
item of information. A byte typically consists of 8 bits.
◉ Carbon footprint. Answer: the amount of carbon dioxide an
individual or organisation produces as a result of the energy they
consume.
◉ Central processing unit (CPU). Answer: hardware device that
carries out the processing in a computer.
◉ Character set. Answer: the defined list of characters recognised by
a computer's hardware and software.
◉ Checksum. Answer: an error detection technique. A mathematical
formula is applied to the data and the resulting numerical value is
transmitted with the data. The recipient computer applies the same
formula to the received data and then compares the checksum sent
With the data to the calculated checksum. ii the checksums don't
match the data is likely to have been corrupted and the recipient
computer requests the data again.
CERTIFICATION EVALUATION EXAMS 2026
QUESTIONS WITH SOLUTIONS GUARANTEED
PASS
◉ Attribute. Answer: an item of data stored about an entity.
◉ Audit trail. Answer: a record of activities that have taken place on
a computer system. This record is generated automatically and will
record what has happened and who or what made the change.
◉ Authentication. Answer: the process of proving to a computer
system who you are (e.g. using a username and password).
◉ Bandwidth. Answer: the amount of data that can be carried on a
network in a given period of time.
◉ Binary. Answer: information represented by only two values (e.g.
a voltage or no voltage, on or off). There are no communication
errors or misunderstandings because there are no small differences.
◉ Binary digit or bit. Answer: the smallest unit of data that is
represented in a computer. it has a single binary value, either 1 or 0.
,◉ Binary prefix. Answer: multiplies a unit by powers of 2.
◉ Binary shift. Answer: an operation done on all the bits of a binary
value in which they are moved by a specific number of places to
either the left or right.
◉ Bit depth. Answer: the number of bits used to encode the
information from each sample. Increasing the number of bits used
increases the amount of detail contained in each sample.
◉ Boolean. Answer: something that can take only the values True or
False; named after English mathematician George Boole.
◉ Brute force. Answer: an algorithm design that does not include
any techniques to improve performance, but instead relies on sheer
computing power to try all possibilities until the solution to a
problem is found.
◉ Built-in functions. Answer: functions that are provided in most
high-level programming languages to perform common tasks.
◉ Bus. Answer: a group of connections between devices in a
computer.
, ◉ Bus width. Answer: the number of wires that make up a bus this
determines the range of binary numbers that can be transmitted.
◉ Byte. Answer: the basic combination of bits used to represent an
item of information. A byte typically consists of 8 bits.
◉ Carbon footprint. Answer: the amount of carbon dioxide an
individual or organisation produces as a result of the energy they
consume.
◉ Central processing unit (CPU). Answer: hardware device that
carries out the processing in a computer.
◉ Character set. Answer: the defined list of characters recognised by
a computer's hardware and software.
◉ Checksum. Answer: an error detection technique. A mathematical
formula is applied to the data and the resulting numerical value is
transmitted with the data. The recipient computer applies the same
formula to the received data and then compares the checksum sent
With the data to the calculated checksum. ii the checksums don't
match the data is likely to have been corrupted and the recipient
computer requests the data again.
