Cambridge IGCSE Computer Science FINAL EXAMS [100% PASS]

Cambridge IGCSE Computer Science FINAL EXAMS [100% PASS] HTTP - hypertext transfer protocol *Ans* a set of rules which must be followed when transferring files across the internet URL - uniform resource locator *Ans* used to find/identify a webpage on the internet 1. webserver name 2. file name 3. protocol web browser *Ans* software that allows a user to display a webpage on their screen - they interpret html code and show the result actuator *Ans* used in many control operations involving sensors and ADC/DACs. Electromagnetic device eg. motor that outputs result of sensor operation loudspeaker *Ans* output device that produces sound using voltages at different levels which vibrate a cone in speaker housing LED *Ans* Used for backlighting a monitor/tv - they are thin, produce a white light, and do not require much power CCFL *Ans* Old technology used for backlighting - took time to warm up, and produced yellow-ish lighting + required a lot of power volatile *Ans* memory that loses its contents when the power is off eg. main memory non-volatile *Ans* memory that doesn't lose its contents when the power is off e.g. hard disk off-line storage *Ans* storage that can be physically moved away from a device and stored somewhere else e.g. CD, USB stick, DVD SRAM *Ans* type of RAM that has 'flip flops' to hold each bit of memory. Does not need constant refreshing. magnetic media *Ans* 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 *Ans* our way of telling a computer what to do, how to do it, and when to do it assembly language *Ans* code that is specific to a particular hardware, but needs to be translated into machine code before it can run machine code *Ans* the binary code that is specific to a machine and does not need