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(ii) Handling Input/output Operations The Operating System is responsible for handling various type of inputs ( For example, input from keyboard, input from mouse etc.) and various types of outputs in the appropriate manner. What types of services are provided by an operating system? Some common services provided by operating system can be listed as follow: (i) Program Execution (ii) Handling Input/output Operations (iii) Manipulation of File System (iv) Error Detection and Handling (v) Resource Allocation (vi) Accounting (vii) Information and Resource Protection (i) Program Execution The Operating System is responsible for executing various programs whether user programs or system programs that is, special programs required for the machine functioning. The benefits of multiprogramming are as follow: In place of making CPU sit idle, another job takes over the use of CPU, increasing efficiency thereby and reducing CPU idle time. While CPU is executing a job, it has to wait for the job if the job requires certain Input/output operation, the CPU waits for the Input/output operation to get over and that wait time is CPUвЂ™s idle time. Multiprogramming, undoubtedly, improves the overall efficiency of the computer system by getting more work done in less time as the CPU may be shared among a number of active programs which are present in the memory at the same time. Therefore, this very function is also termed as CPU Scheduling. Q15.Explain briefly the functions performed by an operating system as processor manager? As the name itself suggests, Processor Management means managing the process or processor that is, the CPU.

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