AQA A-Level Computer Science
Study online at https://quizlet.com/_huu8nb
1. Absolute Error The difference between the actual number and the nearest
representable value.
2. Abstract Data Type (ADT) A data type whose properties are specified independently of any
particular programming language.
3. Abstract data type (ADT) A data type whose properties are specified independently of any
particular programming language.
4. Abstraction Representation that is arrived at by removing unnecessary de-
tails.
5. Aggregation A type of association where the aggregated object has a weaker
form of association with the objects that it is aggregating than
is the case with composition. These objects have an existence
independent of the aggregated object and can continue to exist
even after the aggregated object is disposed of.
6. Ajax Web technology that allows only the part of a web page that
needs updating to be fetched from the web server.
7. Algorithm A sequence of unambiguous instructions for solving a problem.
It can be represented as a Turing machine program.
8. Application programming in- A layer of software that allows application programs to call on
terface (API) the services of the operating system.
9. Association If the relationship is not inheritance or aggregation it is an
association.
10. Asymptotic behaviour of f Behaviour of the function f(n) for very large values of n.
11. Asynchronous serial data Transmission system in which the sender and receiver have sep-
transmission arate clocks which are not kept synchronised. Instead, the clocks
, AQA A-Level Computer Science
Study online at https://quizlet.com/_huu8nb
are synchronised temporarily at the start of a transmission. The
arrival of data cannot be predicted by the receiver; s a start
bit is used to signal the arrival of data and to synchronise the
transmitter and receiver temporarily.
12. Attribute A property or characteristic of an entity (databases) or an object
(OOP).
13. Automation Turning an abstraction into a form that can be processed by a
computer.
14. Bandwidth For a transmission medium, the range of signal frequencies it
may transmit.
15. Base case A value that has a solution which does not involve any reference
to the general case solution.
16. Baseband system A system that uses a single data channel system in which the
whole bandwidth of the transmission medium is dedicated to
one data channel at a time.
17. Basic operation The operation which contributes most to the total running time.
18. Baud rate The rate at which signals on a wire may change.
19. Behaviours The functions of the object or what the object does.
20. Bit rate The number of bits transmitted per second.
21. Broadband A multiple data channel system in which the bandwidth of the
transmission medium carries several data streams at the same
time.
22. Bubble sort
Study online at https://quizlet.com/_huu8nb
1. Absolute Error The difference between the actual number and the nearest
representable value.
2. Abstract Data Type (ADT) A data type whose properties are specified independently of any
particular programming language.
3. Abstract data type (ADT) A data type whose properties are specified independently of any
particular programming language.
4. Abstraction Representation that is arrived at by removing unnecessary de-
tails.
5. Aggregation A type of association where the aggregated object has a weaker
form of association with the objects that it is aggregating than
is the case with composition. These objects have an existence
independent of the aggregated object and can continue to exist
even after the aggregated object is disposed of.
6. Ajax Web technology that allows only the part of a web page that
needs updating to be fetched from the web server.
7. Algorithm A sequence of unambiguous instructions for solving a problem.
It can be represented as a Turing machine program.
8. Application programming in- A layer of software that allows application programs to call on
terface (API) the services of the operating system.
9. Association If the relationship is not inheritance or aggregation it is an
association.
10. Asymptotic behaviour of f Behaviour of the function f(n) for very large values of n.
11. Asynchronous serial data Transmission system in which the sender and receiver have sep-
transmission arate clocks which are not kept synchronised. Instead, the clocks
, AQA A-Level Computer Science
Study online at https://quizlet.com/_huu8nb
are synchronised temporarily at the start of a transmission. The
arrival of data cannot be predicted by the receiver; s a start
bit is used to signal the arrival of data and to synchronise the
transmitter and receiver temporarily.
12. Attribute A property or characteristic of an entity (databases) or an object
(OOP).
13. Automation Turning an abstraction into a form that can be processed by a
computer.
14. Bandwidth For a transmission medium, the range of signal frequencies it
may transmit.
15. Base case A value that has a solution which does not involve any reference
to the general case solution.
16. Baseband system A system that uses a single data channel system in which the
whole bandwidth of the transmission medium is dedicated to
one data channel at a time.
17. Basic operation The operation which contributes most to the total running time.
18. Baud rate The rate at which signals on a wire may change.
19. Behaviours The functions of the object or what the object does.
20. Bit rate The number of bits transmitted per second.
21. Broadband A multiple data channel system in which the bandwidth of the
transmission medium carries several data streams at the same
time.
22. Bubble sort
