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define the dosexecpgm functions used in the os2dosexecpgm objbuffer objlen flags cmdline env ampresultcode execnamedosexecpgm function is designed to
explain the exit status function exit function causes the calling process to be terminated actually all file descriptors are immediately closed
define the sleep sec functionsleep function suspends execution of this process for sec number of seconds while this function is used in our example
explain the fork functionfork function causes a new process to be created the calling progress is duplicated as an exact copy called the child
explain the architecting for processesprocesses are very important to the server application developer as they may be used to increase responsiveness
explain the advantages and drawback of multiple processesapplication architected to take advantage of multiple processes will certainly see
processes- making the system more responsive and usefula method by definition build up of a code execution and resource ownership a process has two
define io and cpu bursts applications typically to through cycle of cpu bursts and inputoutput bursts since the cpu sits idle during io
architects applications by making use of multitaskingas the capability of computer hardware keeps increasing operating systems are presented with
what is multitaskingmultitasking provides power to users by offering them to run multiple applications at once the applications are loaded into
what is multiprogrammingmultiprogramming is the capability of am operating system to support multiple applications running concurrently
define the scheduling in multitaskingearlier we learned the concepts and advantages of multitasking in a system in which one or more tasks threads or
develop a utility in c language which will run in linux operating systems to display following properties of the system processor speed ram
utility programs those programs which are not the essential part of operating system but they provide different utilities features to the users eg
system service programsystem service program supports and provides the services for other program system service program perform varity of tasks
control programscontrol programs are those programs which control amp maintain the operation of computer they provide basic facilities control
explain deadlockevery process in a set of processes is waiting for an event which only a process in the set can
explain the fork-jointhis is primitives in a higher level programming language for implementing interacting processes the syntax is like thisfork
explain the real time operating systema real-time operating system comprises definite fixed time constraints processing should be done in the defined
overlay structured programa program consisting of overlays is referred as overlay structured program in which an overlay is a part of program which
facilities of a debug monitorfacilities of a debug monitor are like this setting breakpoints in the program initiating a debug conversation while
lexical substitution during macro expansionlexical substitution is employed to produce an assembly statement from a model statement a model statement
pure and impure interpreters in a pure interpreter the source program is maintained in the source form throughout its
elimination of common sub expression during code optimizationan optimizing transformation is a rule for rewriting a section of a program to enhance
explain the advantage of assembly language the advantages of assembly language program isa reduced errors b faster