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IGCSE COMPUTER SCIENCE – SOFTWARE EXAM QUESTIONS WITH CORRECT ANSWERS
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IGCSE COMPUTER SCIENCE – SOFTWARE EXAM QUESTIONS WITH CORRECT ANSWERS
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IGCSE COMPUTER SCIENCE –SOFTWARE EXAM QUESTIONS WITH
CORRECT ANSWERS
Relationship between hardware, system software, and application software? - answer-
hardware is needed for system software, and system software is needed to run
application software
System software - answer-def. Set of programs to control and manage the operation of
computer software
Provides a platform on which other software can run
Required, to allow hardware and software to run without problems
Provides hci : human computer interface * controls the allocation & usage of hardware
resources
Application software - answer-def. Set of programs used to perform various applications
on a computer
Allows user to perform specific tasks, using computer's resources
Can be single / suite of programs
User can execute the software as and when they require
Types of application software - answer-
Word processor - answer-used for manipulating text document
Spreadsheet - answer-used to organise and manipulate numerical data
Database - answer-used to organise and manipulate & analyse data, with a table having
records and fields
App(lications) - answer-software which runs on mobile phones or tablets
Graphics manipulation software< - answer-used to manipulate bitmap and vector
images
Video editing software - answer-used to manipulate and produce videos
Photo editing software - answer-used to manipulate digital photographs
Control and measuring software - answer-used to allow a computer or microprocessor,
to interface with sensors, to measure physical quantities with sensor and control
applications by comparing sensor data with stored data & sending signals
, Linker - answer-used to take one or more object file (produced by the compiler) and
combine them into a single program
Utility software - answer-def. Softwares that are designed to carry out specific tasks on
a computer, to manage / maintain and control computer resources (usually don't require
user input to start)
Examples of utility software - answer-
Virus checkers - answer-constantly checks for virus at the background —> checks the
files before they run and compare with database of known viruses / heuristic checking
—> puts the file in quarantine / automatically delete it or ask user to make decision
about deleting
Heuristic checking - answer-even if the virus is not in the database, it can be detected
by checking for types of behaviour that indicates a possible virus
False positive - answer-in virus checking, when the user surely knows that the file is not
infected
Defragmentation software - answer-as the data in hdd is constantly deleted and added,
the file blocks will be scattered all over the disk surface —> slower access time —>
makes each file in hdd be stored in contiguous sectors.
Back-up software - answer-allows schedule for backing up to be made / or carry out the
backup procedure only when there is change in files
Security software - answer-manages access control and user accounts
Link into other utility software (virus checker, screensaver...)
Protects network interfaces * uses encryption & decryption oversees the updating of
software
Screensaver - answer-programs that supply moving and still images on the monitor
screen, after a period of inactivity by the computer
Device driver - answer-software that communicate with the operating system & translate
data into a format understood by a hardware peripheral device
Os (operating system) - answer-provide environment in which applications can be run &
useable interface between humans and computer
Hci
Multitasking
Security (manages accounts...)
Interrupt handling routines
Memory management
Hardware peripheral management
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