AQA A-LEVEL COMPUTER SCIENCE
PAPER 2 SCRIPT COMPLETE ANSWERS
GRADED A+
◉ Digital data
Answer: Data stored and created by a computer.
◉ Sound Synthesis
Answer: A term that is used to refer to sound that is produced
digitally rather than in analogue format. It means that sound is
synthesized or manufactured rather than being in its original
format.
◉ Lossless Compression
Answer: A form of compression that groups up all of the
individual bits that have matching values (Eg. B, B, B becomes 3B)
to reduce file size.
◉ Unsigned binary
Answer: Binary that represents positive numbers only.
◉ Check digit
Answer: A digit added to the end of binary data to check the data
is accurate.
, ◉ Unicode
Answer: A standard binary coding system that has superseded
ASCII. Universal as it contains special characters from languages
such as Russian and Mandarin.
◉ ASCII
Answer: American Standard Code for Information Interchange. It
is the agreed upon representation of keyboard characters.
◉ Utility programs
Answer: Programs that perform specific common task related to
running the computer e.g zipping files.
◉ Language translators
Answer: Software that converts programming language
instructions into 0s and 1s (machine code).
◉ Special purpose software
Answer: Performs a single task. This task might be complex like
payroll calculation, stock control etc. but will be based on a single
task.
◉ General purpose software
PAPER 2 SCRIPT COMPLETE ANSWERS
GRADED A+
◉ Digital data
Answer: Data stored and created by a computer.
◉ Sound Synthesis
Answer: A term that is used to refer to sound that is produced
digitally rather than in analogue format. It means that sound is
synthesized or manufactured rather than being in its original
format.
◉ Lossless Compression
Answer: A form of compression that groups up all of the
individual bits that have matching values (Eg. B, B, B becomes 3B)
to reduce file size.
◉ Unsigned binary
Answer: Binary that represents positive numbers only.
◉ Check digit
Answer: A digit added to the end of binary data to check the data
is accurate.
, ◉ Unicode
Answer: A standard binary coding system that has superseded
ASCII. Universal as it contains special characters from languages
such as Russian and Mandarin.
◉ ASCII
Answer: American Standard Code for Information Interchange. It
is the agreed upon representation of keyboard characters.
◉ Utility programs
Answer: Programs that perform specific common task related to
running the computer e.g zipping files.
◉ Language translators
Answer: Software that converts programming language
instructions into 0s and 1s (machine code).
◉ Special purpose software
Answer: Performs a single task. This task might be complex like
payroll calculation, stock control etc. but will be based on a single
task.
◉ General purpose software
