AQA A LEVEL COMPUTER
SCIENCE PAPER 2 EXAM
QUESTIONS CORRECTLY
ANSWERED
What is an adder? - ANSWER -A logic circuit that adds to Boolean
values together
What is a half adder? - ANSWER -A logic circuit with two inputs, two
outputs, and two logic gates
What does a half adder look like? - ANSWER -XOR gate on top AND
gate on bottom
What is a full adder? - ANSWER -A logic circuit with three inputs and
two outputs
,What is the purpose of the 3rd input in a full adder? - ANSWER
Enables the circuit to add 2 Boolean values and a carry bit from a
previous operation
A full adder circuit: - ANSWER -
What is application software? - ANSWER -Software that completes a
specific task for the user, ie web browser or word processor
What is system software? - ANSWER -Software that operates,
controls, and maintains the computer and its components, ie utility
programs or translators
What does an operating system do? - ANSWER -It hides the true
complexities of a computer from the user by creating a virtual
machine
What are the functions of an operating system? - ANSWER -Memory
management, processor scheduling, interrupt handling, i/o
management, and creating a user interface
, What do utility programs do? - ANSWER -Housekeeping tasks in a
computer such as data backup, defragmenting hard drives, data
compression, and encryption
What do library programs do? - ANSWER -They contain useful
functions that are frequently used by a program, libraries can be used
by a programmer to simplify the process of programming
What do translators do? - ANSWER -They convert programming
languages into other programming languages
What are the 3 translators? - ANSWER -Interpreter, Compiler, and
assembler
What are 2 low level programming languages? - ANSWER -Assembly
language and Machine code
What is machine code? - ANSWER -A programming language written
in binary that directly manipulates a computer's processor
SCIENCE PAPER 2 EXAM
QUESTIONS CORRECTLY
ANSWERED
What is an adder? - ANSWER -A logic circuit that adds to Boolean
values together
What is a half adder? - ANSWER -A logic circuit with two inputs, two
outputs, and two logic gates
What does a half adder look like? - ANSWER -XOR gate on top AND
gate on bottom
What is a full adder? - ANSWER -A logic circuit with three inputs and
two outputs
,What is the purpose of the 3rd input in a full adder? - ANSWER
Enables the circuit to add 2 Boolean values and a carry bit from a
previous operation
A full adder circuit: - ANSWER -
What is application software? - ANSWER -Software that completes a
specific task for the user, ie web browser or word processor
What is system software? - ANSWER -Software that operates,
controls, and maintains the computer and its components, ie utility
programs or translators
What does an operating system do? - ANSWER -It hides the true
complexities of a computer from the user by creating a virtual
machine
What are the functions of an operating system? - ANSWER -Memory
management, processor scheduling, interrupt handling, i/o
management, and creating a user interface
, What do utility programs do? - ANSWER -Housekeeping tasks in a
computer such as data backup, defragmenting hard drives, data
compression, and encryption
What do library programs do? - ANSWER -They contain useful
functions that are frequently used by a program, libraries can be used
by a programmer to simplify the process of programming
What do translators do? - ANSWER -They convert programming
languages into other programming languages
What are the 3 translators? - ANSWER -Interpreter, Compiler, and
assembler
What are 2 low level programming languages? - ANSWER -Assembly
language and Machine code
What is machine code? - ANSWER -A programming language written
in binary that directly manipulates a computer's processor
