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q how many instructions in a computer a computer can have a vast number of instructions and addressing modes older computers with the growth of
q how is an instruction representedinstruction is signified as a sequence of bits a layout of an instruction is called as instruction format
for this machine there can be two more possible addressing modes in addition to direct andimmediate opcode field of an instruction is a group
q define opcode and operandsthe most common fields which are found in instruction formats areopcode what operation to perform an operation code
q what are the elements of an instruction as the function of instruction is to communicate to cpu what to do it needs a minimum set of communication
q describe about instruction setinstruction set is the boundary where computer designer and computer programmer see the same computer from various
q what is switched mode power supplysmps is the unit into which electric supply from the mains is connected to your pc and this supplies dc to
q power supply in computer systemcomputer operate electronically- either by power supply attained from your electric plug or batteries in case of
dont scan at more resolution than needed this saves both disk and time space typically itisnt useful to scan at more than optical resolution
q describe the size and speed of scannersbefore actual scanning a quick low resolution scan known as pre-scan is made to preview the image and select
q show the dynamic range and colour depthdynamic range is the number of colours a colour scan or number of grays a monochrome scanner can distinguish
q what is interpolated resolutionevery scanner is accompanied by a software this software can raise the apparent resolution of scan by a scheme known
optical resolution or hardware resolution is mechanical limit on resolution of scanner for scanning the sensor has to advance after every line it
q application and factors related to scannerswhen you purchase a scanner there are various factors which can be looked at compatibility of scanner
q describe about modem languagemodems understand a set of instructions known as hayes command set or at command set these commands are used to
q illustrate working of pocket and pc-card modemspocket modems small external modems used with notebook pcs pc-card modems pc and modems are
q what is external modemsexternal modems modems externally associated to pc via a parallel or serial port and into a telephone line at the other
q explain what is internal modems internal modems internal modems plug in expansion slots in your pc internal modems are efficient andcheap internal
q why we use modema modem is one device which most computer users who have surfed internet are aware of a modem is neededsincehowever most of
q which colour technologies used in monitors and printermonitor screens and printers use different colour technologies the monitor uses rgb and
q what is ditheringcmyk provides only 8 colours c m y k violet c m orange m y green c y and colour of paper itself what about other colours
q explain rby and cmyk colour printingfor good printing printers dont use rby in place of that they use cmyk cyan instead of blue magenta instead of
there are three primary colours in pigments - red yellow and blue there are two ways to produce more colours physical mixing physically mix
q what is laser printerslaser printers are page printers for print quality they also face same addressability issues as dmpinkjet printers though
q explain working of dotmatrix or inkjet printersthree major issues consider the quality of characters generated by dotmatrixinkjet printers - number