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Write a short note on disk scheduling
One of the responsibities of operating system O/S is to use the hardware efficiently. Whenever a process requires I/O to or from the disc it issues a system call to the operating system. The request state severer pieces of information:
If the disk controller and drive are available the request can be serviced immediately. If the controller or drive is busy any new request for service will be placed on the queue of pending request for that drive. For a multiprogramming system with several processes the disk queue may often have several pending requests. Therefore when request is accomplish the operating system chooses which pending request to service next.
What is a file path name? A list of the subdirectories, directories, and files we must traverse to reach a file from the root directory.
What are the phases of background processing? Phases are:- Job Scheduling. Job Processing. Job Overview.
Define process? What is meant by state of a process? Process is a program in implementation. A process in general includes the process stack, which consists temporary data and
Q. What is the use of system calls? Answer: System calls permit user-level processes to request services of the operating system.
what is Number System
A thread is defined as an independent stream of instructions that can be scheduled to run as such by the operating system. Each program contains a number of threads which can be ru
How does communication takes place in a distributed system? Distributed systems depend on the networking for their functionality. A network is a communication path among two
Determine a critical section is a program segment Critical section is where shared resources are accessed
Define Segmentation The memory allocation method subject to “external” fragmentation is Segmentation.
Q. How does DMA raise system concurrency? How does it make difficult hardware design? Answer: DMA increases system concurrency by allowing the CPU to perform tasks while the
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