Operating System (Assignment)

1. In a multiprogramming and magazine sacramental manduction environment, several(prenominal) substance abusers sh be the system of rules simultaneously. This situation substructure results in various credential problems. a. What ar the 2 such problems? autonomic nervous system The two problems in Multiprogramming and time sharing environment be Stealing or copying a users files Writing oer another programs (belonging to another user or to the OS) area in memory victimisation system resources ( central processor, disk space) without proper write up Causing the printer to mix turnout by sending data period some other users file is printing. ttp//wiki. answers. com/Q/What_are_the_main_two_problems_in_multiprogramming_environment_when_processes_are_run_concurrently_and_ plowshare_the_resources b. stomach we ensure the same degree of security in a time divided up machine as in a dedicated machine? Explain. Ans No, because time-shared machines are far less secure, and are tru ly easy to everyplaceload the buffers. Also they are much slower to catch a virus. http//wiki. answers. com/Q/ ass_we_ensure_the_same_security_in_a_time-shared_machine_as_in_a_dedicated_machine . The issue of resource utilization shows up in differenct forms in different types of operate systems. List what resources must be manged cautiously in the following settings a. Mainframe or Mini reckoner systems Ans Memory, mainframe computer, Storage b. Workstations connected to servers Ans Storage, Network Bandwidth c. Handheld computers Ans Memory, processor, Storage, author 3. Describe the residue regular and irregular multiprocessing. What are three advantages and one disadvantages of multiprocessor system? AnsThe difference amongst symmetric and asymmetric multiprocessing is that in isobilateral processing treats on the whole processors as equals I/O shag be graceful on any of them, dapple unsymmetric processing designates one CPU as the master, which is the completely one capable of execute I/O the master distributes computational work among the other CPUs. Advantagesmultiprocessor system ?Can save money, by sharing personnel supplies, housings, and peripherals ? Can execute programs more cursorily ?Can have increase reliableness Disadvantagesmultiprocessor system More complex in both hardware and software. Additional CPU cycles are required to manage the cooperation, so per-CPU efficiency goes down. http//www. studymode. com/essays/Os-Assignment-419243. html 4. Distinguish between the client server and catch to peer models of distributed systems. Ans A client-server model can be defined as a change environment, where all users, objects, resources, and so on are administered in a centralized location and can, if configured, use any interlock resources on any workstation on the domain. while a Peer-to-peer model can be defined as a change environment, where the user must be delegate permissions on each workstation in send to access any avai lable resources. 5. What is the calculate of interrupts? What are the difference between a trap and an interrupt? Can traps be generated intentionally by a user program? If so, for what purpose? Ans The difference between delay and Trap is that Interrupt is a hardware-generated signal that changes the flow inside the system. While a trap is a software-generated interrupt. 6.Define the essential properties of the following types of operating systems. a. set Jobs with similar needs are batched unneurotic and run through the computer as a group, by an operator or automatic job sequencer. Performance is increased by attempting to keep CPU and I/O devices busy at all times through buffering, off-line operation, spooling, and multiprogramming. b. interactive Composed of many short legal proceeding with input and output read/scripted on the screen the results and timing of the conterminous transaction may be unpredictable. flavour that a urely interactive system (no time-sharing) on ly has one user e. g. , a PC). c. Time-sharing Uses CPU scheduling and multiprogramming to provide scotch interactive use of a system. The CPU switches rapidly from one user to another. d. real time The system must respond to inputs/commands inside a fixed amount of time to ensure correct performance. Input is typically read from sensors. e. NetworkConsists of two or more computers that are linked in order to share resources (such as printers and CDs), transpose files, or allow electronic communications.The computers on a network may be linked through cables, telephone lines, piano tuner waves, satellites, or infrared light beams. f. repeatMore than one event natural event at a time. It is usually contrasted with serial, message only one event misfortune at a time. g. Distributed Divides computation up among several computers. The computers do not share memory or a measure they communicate with each other over communication lines (e. g. , high-speed bus, telephone line). h. assemble i. HandheldA handheld computer is a computer that can conveniently be stored in a sackful (of sufficient size) and used while youre prop it.