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What is Multiprogramming?
Multiprogramming is the capability of am operating system to support multiple applications running concurrently. Multiprogramming simply means that an operating system can run many ( one or more) applications at the same time.
Only one application can actually use a processor at a time, but the multiprogramming operating system is responsible for dividing the processor's execution time and sharing the processor between many applications. In multiprocessor system, the operating system may creatively schedule process to maximize the efficiency of the available CPUs. A term more extensively employed today to describe multiprogramming is multitasking.
When you run a program on your UNIX system, the system prepares a special environment for that program. This environment owns everything needed for the system to execute the progra
What is a path name? A pathname is the path from the root by all subdirectories to a specified file. In a two-level directory structure a user name and a file name explain a pa
How can the deadlock be prevented Bankers algorithm : The Resource allocation graph algorithm isn't applicable to a resource allocation system with multiple instances of every
An operating system provides the environment within that programs are executed. Internally operating systems differ greatly in their makeup because they are organized along many di
Q. What kinds of services does the process manager provide? Define local procedure call? Answer: The process manager offers services for creating and deleting and using proce
Explain how the os implements virtual memory phenomenon.
a) The barber shop has one barber, one barber chair, and n chairs for waiting customers, to sit on. If there are no customers present, the barber sits down in the barber chair and
Suppose your process starts up, and allocates some memory with malloc(). The allocator will then give part of a memory page to your process. The OS then updates the corresponding p
What are the different thread levels? There are two broad type of thread implementation: User-Level Threads -- Thread Libraries. Kernel-level Threads -- System Calls.
Q. How does the distinction among kernel mode and user mode function as a rudimentary form of protection (security) system? Answer: The distinction among kernel mode and user m
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