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q factors of information system which affect the businessthere are several factors which affect the business such as -a threats of fresh entrantsb
q describe short note on information system for strategic advantageans strategic role of information systems engage using information technology to
q explain functional roles of information systemfunctional roles of information system1 lower costs -a use it to significantly reduce the cost of
q what do you mean by information systeman information system is an planned combination of hardware people communication networks software and data
q requirements of decision support systema fast computation a decision maker is able to perform a large number of computations very quickly and that
q characteristics of decision support systemcharacteristics of dss- the qualities of the dss are as follows -1 dss focus on towards providing
q definition of decision support systemdefinition of dss a decision support system is a specific kind of information system which is an interactive
q define decision support system ans the decision support system is an information system application which help decision making dss tends to be used
q what is input - output commandsthere are four kinds of io commands which an io interface can receive when its addressed by a processor control this
q programmed input - output technique for computersprogrammed inputoutput is a useful io technique for computers where hardware costs need to be
q device drivers in windows systemin windows system device drivers are implemented as dynamic link libraries dlls this scheme has advantages which
in ms-dos device drivers are installed and loaded dynamically it implies that they are loaded into memory when computer is started or re-booted and
device drivers in unix ms-dos and windows systemthough device drivers are in effect add-on modules they are however considered to be part of system
a device driver is software interface that manages communication with and control of a particular io device or type of device it is task of device
q benefits of device controllersusing device controllers for attaching io devices to a computer system in place of connecting them directly to system
all components of computer communicate with processor by the system bus which means io devices required to be attached to system bus but io devices
error detection mechanism may include checking mechanical and data communication errors these errors must be reported to processor the illustrations
data buffering is quite helpful for purpose of smoothing out gaps in speed of processor and io devices data buffers are registers that hold io
q how i-o interface communicate with processorthe above illustration clearly specifies need communication between processor and io interface this
q illustrate control and timing signalsthe requirement of io from different io devices by processor is quite unpredictable in fact it relies on io
q what is functions of input - output interfacean io interface is bridge between processor and io devices it controls data exchange between external
the io interface provides a technique for transferring information between external io devices and internal storage peripherals linked to a computer
q what is microcomputer systemthe microcomputer has a single microprocessor and a number of ram and rom chips as well as an interface unit which
q illustrate cache dramcache dram cdram which is developed by mitsubishi integrates a tiny sram cache 16kb on a generic dram chip sram on the cdram
q what is rambus dramrdram which was developed by rambus has been adopted by intel for its pentium and itanium processors it has become main