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What are the main differences between operating systems for mainframe computers and personal computers?
The design goals of operating systems for those machines are quite different. PCs are inexpensive, so wasted resources like CPU cycles are inconsequential. Resources are wasted to improve usability and enhance software user interface functionality. Mainframes are the opposite, so resource use is maximized, at the expensive of ease of use.
#question.explain varios types of system calls..
Q. Explain the actions taken by a kernel to context switch between kernel level threads. Answer: Context switching among kernel threads classically requires saving the value
What does it mean for something to be thread-safe? By saying that X is thread-safe, we mean that if multiple threads use X at the same time, we don't have to worry about concurrenc
NEXT FIT ALGORITHM Here scanning starts from the first fit position and then it finds the next position which is large sufficient to hold the process. Thus the name next fit.
For example, by initializing a semaphore to 0, threads can wait for an event to occur, and impose an ordering constraint, similar to a monitor using condition variables, but with m
Q. How does NTFS handle data structures? How does NTFS recover from a system crash? What is guaranteed after a recovery takes place? Answer: In NTFS all file-system data stru
You have a system with two primary workloads. One performs sequential access to a set of large files, the other performs small, independent, random reads to a separate set of large
Q. a number of systems automatically delete all user files when a user logs off or a job terminates unless the user explicitly requests that they be kept other systems keep all fil
Briefly explain process management in Windows 2000. The Windows 2000 process manager provides for deleting, creating and using threads and processes. It has no knowledge about
How a virtual memory can be implemented? What are the benefits of using virtual memory?
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