IGCSE COMPUTER SCIENCE EXAM
IGCSE COMPUTER SCIENCE EXAM GRADED A+
HTTP - hypertext transfer protocol - correct answer a set of rules
which must be followed when transferring files across the
internet
URL - uniform resource locator - correct answer used to
find/identify a webpage on the internet 1. webserver name 2.
file name 3. protocol
web browser - correct answer software that allows a user to display
a webpage on their screen - they interpret html code and show
the result
,IGCSE COMPUTER SCIENCE EXAM
actuator - correct answer used in many control operations involving
sensors and ADC/DACs. Electromagnetic device eg. motor that
outputs result of sensor operation
loudspeaker - correct answer output device that produces sound
using voltages at different levels which vibrate a cone in speaker
housing
LED - correct answer Used for backlighting a monitor/tv - they are
thin, produce a white light, and do not require much power
CCFL - correct answer Old technology used for backlighting - took
time to warm up, and produced yellow-ish lighting + required a
lot of power
volatile - correct answer memory that loses its contents when the
power is off eg. main memory
non-volatile - correct answer memory that doesn't lose its contents
when the power is off e.g. hard disk
,IGCSE COMPUTER SCIENCE EXAM
off-line storage - correct answer storage that can be physically
moved away from a device and stored somewhere else e.g. CD,
USB stick, DVD
SRAM - correct answer type of RAM that has 'flip flops' to hold each
bit of memory. Does not need constant refreshing.
magnetic media - correct answer secondary storage with
mechanical parts which move over the surface to read and
write data magnetically e.g. a hard disk, tape or floppy disk
program - correct answer our way of telling a computer what to do,
how to do it, and when to do it
assembly language - correct answer code that is specific to a
particular hardware, but needs to be translated into machine
code before it can run
machine code - correct answer the binary code that is specific to a
machine and does not need translating in order to run
translator - correct answer program that changes higher level
language into machine code
, IGCSE COMPUTER SCIENCE EXAM
compiler - correct answer this translates HLL into machine code.
Once it has done this, the program can be used multiple times
without translating it again
UPS - correct answer uninterruptable power supply
cracking - correct answer editing source code with malicious intent
firewall - correct answer this examines traffic between a user's
computer and the internet by checking what is/isn't allowed
and blocking traffic that does not meet certain criteria
proxy server - correct answer this filters web traffic, keeps the IP
address secret, and, using a cache, speeds up access to
websites that have been visited before
TLS - Transport Layer Security - correct answer this is a form of
secure data transmission made up of 2 layers: the record
protocol, and the handshaking protocol. It is very secure and
fairly new, and can make use of session caching, which
improves performance. It involves many complicated
IGCSE COMPUTER SCIENCE EXAM GRADED A+
HTTP - hypertext transfer protocol - correct answer a set of rules
which must be followed when transferring files across the
internet
URL - uniform resource locator - correct answer used to
find/identify a webpage on the internet 1. webserver name 2.
file name 3. protocol
web browser - correct answer software that allows a user to display
a webpage on their screen - they interpret html code and show
the result
,IGCSE COMPUTER SCIENCE EXAM
actuator - correct answer used in many control operations involving
sensors and ADC/DACs. Electromagnetic device eg. motor that
outputs result of sensor operation
loudspeaker - correct answer output device that produces sound
using voltages at different levels which vibrate a cone in speaker
housing
LED - correct answer Used for backlighting a monitor/tv - they are
thin, produce a white light, and do not require much power
CCFL - correct answer Old technology used for backlighting - took
time to warm up, and produced yellow-ish lighting + required a
lot of power
volatile - correct answer memory that loses its contents when the
power is off eg. main memory
non-volatile - correct answer memory that doesn't lose its contents
when the power is off e.g. hard disk
,IGCSE COMPUTER SCIENCE EXAM
off-line storage - correct answer storage that can be physically
moved away from a device and stored somewhere else e.g. CD,
USB stick, DVD
SRAM - correct answer type of RAM that has 'flip flops' to hold each
bit of memory. Does not need constant refreshing.
magnetic media - correct answer secondary storage with
mechanical parts which move over the surface to read and
write data magnetically e.g. a hard disk, tape or floppy disk
program - correct answer our way of telling a computer what to do,
how to do it, and when to do it
assembly language - correct answer code that is specific to a
particular hardware, but needs to be translated into machine
code before it can run
machine code - correct answer the binary code that is specific to a
machine and does not need translating in order to run
translator - correct answer program that changes higher level
language into machine code
, IGCSE COMPUTER SCIENCE EXAM
compiler - correct answer this translates HLL into machine code.
Once it has done this, the program can be used multiple times
without translating it again
UPS - correct answer uninterruptable power supply
cracking - correct answer editing source code with malicious intent
firewall - correct answer this examines traffic between a user's
computer and the internet by checking what is/isn't allowed
and blocking traffic that does not meet certain criteria
proxy server - correct answer this filters web traffic, keeps the IP
address secret, and, using a cache, speeds up access to
websites that have been visited before
TLS - Transport Layer Security - correct answer this is a form of
secure data transmission made up of 2 layers: the record
protocol, and the handshaking protocol. It is very secure and
fairly new, and can make use of session caching, which
improves performance. It involves many complicated
