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q what are the three main activities of an operating system in regard to secondary-storage managementanswer1 free-space management2 storage
q what are the three main activities of an operating system in regard to memory managementanswera keep follows of which parts of memory are currently
q what are the five main activities of an operating system in regard to process managementanswera the creation as well as deletion of both user and
q what is the use of system callsanswer system calls permit user-level processes to request services of the operating
q is the internet a lan or else a wananswer the internet is a wan as the a variety of computers are located at geographically different places and
q timers could be utilized to compute the current time provide a little description of how this could be accomplished answer a program could utilize
q several cpus provide for more than two modes of operation what are two probable uses of these multiple modesanswer although most systems merely
q some untimely computers protected the operating system by placing it in a memory partition that couldnt be modified by either the user job or the
q which of the subsequent instructions should be privilegeda read the clockb clear memoryc set value of timerd issue a trap instructione turn off
q how does the distinction among kernel mode and user mode function as a rudimentary form of protection security systemanswer the distinction among
q what is the major difficulty that a programmer should overcome in writing an operating system for a real-time environmentanswer the major
q we have stressed the require for an operating system to make efficient use of the computing hardware when is it suitable for the operating system
q list the four steps that are essential to run a program on a completely dedicated machineanswera reserve machine timeb manually load program into
q what are the major differences between operating systems for mainframe computers and personal computersanswer in general operating systems for
q what are the three major purposes of an operating systemanswer to offers an environment for a computer user to execute programs on computer
timestamps for read operationsif ts t lt w-timestamp q then the transaction t is trying to read a value of data item q which has already been
timestamp ordering protocola timestamp is a tag that can be attached to any transaction or any data item which indicates a specific time on which the
q explain the random key distributionthe triple key management mechanisms ensure a better and complete security solution using the random key
q attacks on wireless networkwsn are vulnerable to attacks which compromise the integrity of the wsn nodes by decreasing the nodes fault tolerance
explain growing phase of lockinggrowing phase in this phase the transaction can only obtain locks but cannot release any lock the transaction enters
depending upon the rules we have found we can classify the locks into two typesshared lock a transaction might be acquiring shared lock on a data
q develop a completely secure wsn based on the triple keywireless network is the most vulnerable type of network to security attack unauthorized
lock based protocola lock is nothing but a mechanism that tells the dbms whether a particular data item is being used by any transaction for
what is a transaction a transaction is an event which happens on the database generally a transaction reads a value from the database or writes a
multilevel index the multilevel index is a modification of the secondary level index system in this system we might be use even more number of levels