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what is erdentity relationship diagram is the graphical representation of the object relationship pair it is mostly used in database
what are attributesattributes are the one which explains the properties of data
what are the characteristics of srsi correct - the srs should be made up to date when appropriate requirements are identifiedii unambiguous - when
normal 0 false false false en-in x-none x-none microsoftinternetexplorer4
what are the steps followed in testingi unit testing - the individual components are tested in this type of testingii module testing - related
what does verification representverification shows the set of activities that are carried out to confirm that the software correctly executes the
what is an effector processthe effector process is a method that verifies itselfthe effector process exists in particular
what are the drawbacks of spiral modeli it is based on customer communication if the communication is not proper then the software product that gets
list the task regions in the spiral model customer communication - in this region it is suggested to set up customer communication planning -
what are the various categories of software system software application software engineeringscientific softwareembedded software web
explain about disk scheduling with neat diagram fcfs schedulingscan schedulingc-scan schedulingsstf schedulinglook
direct memory accessmany computers avoid burdening the main cpu with programmed io by offloading sine if this work to a special-purpose processor
interruptsthe hardware mechanism that enables a device to inform the cpu is called an interrupt the basic interrupt mechanism works as follows the
briefly discuss on io hardwarea controller is a collection of electronics that can operate a port a bus or a device a serial-port controller is an
indexed allocationindexed allocation bringing all the pointers together into one location the index block every file has its own index block which is
linked allocationwith linked allocation every file is a linked list of disk blocks the disk blocks might be scattered anywhere on the disk the
contiguous allocationthe contiguous-allocation method needs each file to occupy a set of contiguous blocks of the disk disk addresses explain a
explain about file allocation methodsthe main problem in direct-access nature is how to assign space to these files so that disk space if utilized
virtual file system serves two important functions1 it divides file-system-generic operations from their execution by defining a clean vfs interface2
virtual file systemsthe file-system execution having of three major layers the first layer is the file-system interface based on the open read write
explain root partitionthe root partitionwhich have the operating-system kernel and potentially other system files is mounted at boot time in
partitions and mountinga disk can be sliced into many partitions or a partition can multiple disks every partition can be either raw having no
explain system-wide open-file and per-process open-filethe system-wide open-file table have a copy of the fcb of each open file as well as other
what is super blocka partition control block have partitions details such as the number of blocks in the partition size of the blocks free-blocks and
explain a boot control blocka boot control block can have the information required by the system to boot an operating from that partition if the disk