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System Service Program
system service program Supports and provides the services for other program. System service program perform Varity of tasks. They are further divided into three portions
i) Linkage Editor: A service routine that converts the output of assemblers and compilers into a form that can be loaded and executed.
To link together separately assembled programs. You may code and assemble a number of subprograms separately and link-edit these subprograms into one executable program. The linkage editor enables data in one subprogram to be recognized in another and facilitates transfer of control between subprograms at execution time. The linking process is usually automatically done by a linker or binder program that searches a set of libraries and other modules in a given order.
ii) Librarian: it is a program that performs all the functions of I/O devices. it has the task of storing programs on the disk, maintain the directory and security of user files.
iii) Input/output control system: the function of this program is to check all the hardware of the computer. The physical operations including accessing of disk ports , checking the states of desired ports etc.
File allocation using I nodes. This method is used to decrease the size of the table in the above method. Every file will have an I-node list. Allow a file have 15 pointers a
What are the operations of processes? Process creation A process may create several new processes. The creating process is called as parent process, where as the new proce
Virtual addresses are made up of two parts: the ?rst part is the page number, and the second part is an offset inside that page. Suppose our pages are 4kb (4096 = 212 bytes) long,
Question: a) The following questions pertain to User and Group accounts in Windows XP: i) Give four differences between a Power User and a Guest User account. ii) Explain h
Q. Presume that we agree that 1 kilobyte is 1,024 bytes 1 megabyte is 1,0242 bytes and 1 gigabyte is 1,0243 bytes. This progression carries on through terabytes, petabytes, and ex
Two Level Directory This kind of structure overcomes the problems of assigning unique names to the files. Thus there need not be any confusion among users. In this kind of s
Describe the purpose of the checkpoint mechanism. How habitually must checkpoints be performed? Explain how the frequency of checkpoints affects: System performance while no
Q. Process migration in a heterogeneous network is typically impossible given the differences in architectures and operating systems. Explain a method for process migration across
shell program for Armstrong number
What does it mean for something to be thread-safe? By saying that X is thread-safe, we mean that if multiple threads use X at the same time, we don't have to worry about concurrenc
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