IGCSE COMPUTER SCIENCE UNIT 4
EXAM QUESTIONS AND ANSWERS
Optical Storage - Answer-storage device that records data by burning microscopic holes
in the surface if the disk with a laser
Solid State Storage - Answer-Secondary storage that works by storing charge
(electrons)
cloud strorage - Answer-secondary storage, often belonging to a third party, that is
accessed via network, normaly in the internet, an can be accessed from anywhere
virtualisation - Answer-any process that hides the true physical nature of a computing
resource, making it look different, usually to simplify the way it is acessed
Embedded System - Answer-An operating system that combines processors and
software in a device.
software - Answer-the set of programs run by a computer system
application software - Answer-computer software created to allow the user to perform a
specific job or task
operating system - Answer-software designed for particular hardware and which
manages other programs access to the hardware
utility sofware - Answer-software that does a useful job for the user that is not essential
to the operating system and not the reason for using a computer in the first place
system software - Answer-operating system and utility softwares
Application Programming Interface (API) - Answer-code that allows to communicate to
each other
Scheduling - Answer-The algorithm that the OS uses to allow each running process to
use the CPU
Computer - Answer-a machine that takes some kind of input from its surroundings,
processes the input according to the given rules, and provides some kind of output
Input - Answer-to enter data into a computer
Process - Answer-to change the meaning or format of some data
EXAM QUESTIONS AND ANSWERS
Optical Storage - Answer-storage device that records data by burning microscopic holes
in the surface if the disk with a laser
Solid State Storage - Answer-Secondary storage that works by storing charge
(electrons)
cloud strorage - Answer-secondary storage, often belonging to a third party, that is
accessed via network, normaly in the internet, an can be accessed from anywhere
virtualisation - Answer-any process that hides the true physical nature of a computing
resource, making it look different, usually to simplify the way it is acessed
Embedded System - Answer-An operating system that combines processors and
software in a device.
software - Answer-the set of programs run by a computer system
application software - Answer-computer software created to allow the user to perform a
specific job or task
operating system - Answer-software designed for particular hardware and which
manages other programs access to the hardware
utility sofware - Answer-software that does a useful job for the user that is not essential
to the operating system and not the reason for using a computer in the first place
system software - Answer-operating system and utility softwares
Application Programming Interface (API) - Answer-code that allows to communicate to
each other
Scheduling - Answer-The algorithm that the OS uses to allow each running process to
use the CPU
Computer - Answer-a machine that takes some kind of input from its surroundings,
processes the input according to the given rules, and provides some kind of output
Input - Answer-to enter data into a computer
Process - Answer-to change the meaning or format of some data
