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Q. Why is it complicated to protect a system in which users are allowed to do their own I/O?
Answer: In earlier chapters we identified a distinction among kernel and user mode where kernel mode is utilized for carrying out privileged operations such as I/O. One reason why I/O should be performed in kernel mode is that I/O requires accessing the hardware as well as proper access to the hardware is necessary for system integrity. If we permit users to perform their own I/O we can't guarantee system integrity.
Explain segmentation hardware? We define an completion to map two-dimensional user-defined addresses into one-dimensional physical addresses. This mapping is affected by means
Making the Transition to Client - Server Programming Making the transition to client - server programming is a significant effort. Client - server applications must be designed
Why interrupt can be used? The majority of the different parts of the PC need to send information to and from the processor and they expect to be able to get the processor's at
Q. What system calls have to be implementing by a command interpreter or shell in order to start a new process? Answer: In the UNIX systems a fork system call followed by an ex
What are the different types of semaphore? Principally the semaphore is able to be classified into two on the basis of their values a) Counting semaphore: In counting s
Differentiate tightly coupled systems and loosely coupled systems? Loosely coupled systems:- Every processor has its own local memory Every processor can communicate
what is unbounded buffer
The producer-consumermodel above has a standard human analogy of an assembly line. Humans have specialized skills, however, whereas threads running the same program do not need to
Performance of Job Scheduling Strategies In this project you will investigate the performance of Job Scheduling strategies, Memory Allocation strategies and a CPU Scheduling s
We have talked about blocking locks, which voluntarily yield, and spinlocks, which just spin until they acquire the lock. At ?rst, it seems like spinlocks are verywasteful, and tha
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