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q what is access latency and rotation speedaccess latency a disk access basically moves the arm to selected cylinder and waits for rotational latency
q evaluate bandwidth of disk drivebandwidth bandwidth can be measured in bytes per second sustained bandwidth is the average data rate at the
q evaluate speed of disk drivedrive speed amount of information which can be transferred in or out of memory in a second is called as disk drive
q characteristics of magnetic disktracks and sectors disk is divided in concentric rings known as tracks thus a track is one complete rotation of
there are various limitations of primary memory like limited capacity which is its not enough to store a very large volume of data and volatility
external interface is interface between io interface and peripheral devices interface can be characterised into 2 main categories a parallel
q what is input-output processorslets briefly summarize the development in area of inputoutput functions these can be briefed as below1 cpu directly
q explain working of direct memory accessin both programmed io and interrupt-driven processor is busy with executing inputoutput instructions and io
q what is bus arbitrationin this technique io interface first needs to control bus and only after that it can request for an interrupt in this
q what do you mean by daisy chainthis scheme provides a hardware poll with this scheme an interrupt acknowledge line is chain by different interrupt
q what do you mean by software pollin this scheme on occurrence of an interrupt processor jumps to an interrupt service program or routine whose job
q what is multiple interrupt linesmultiple interrupt lines simplest solution to problems above is to provide multiple interrupt lines that will
q design issues related to interrupt-driven input - outputso interrupt handling includes interruption of currently executing program execution of
q interrupt - driven input-outputproblem with programmed io is that processor has to wait a long time for io interface to see whether a device is
q what is input - output instructionsan io instruction is stored in memory of computer and is fetched as well as executed by processor producing an
q determine why a new system is requiredfeasibility study - feasibility study is the method of defining the current problem determining why a new
software development life cycle sdlc- sdlc system development life cycle is a well-defined process by which a system is conceived developed and
this step of systems examination is one of the most difficult in this stage systems specifications are identified by asking what who when where and
hello sirmam actually i am trying to implement the concept of mac layer protocols in ns2 but unfortunately i am not able to do that and not
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