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Problem:
a) Explain physically what occurs when a disk is fragmented. What is the purpose of "defragmenting" a disk?
b) What is the idea behind backing up data on a secondary storage?
c) Among the different software, operating systems, applications, utilities and data, which one is the most valuable and therefore requires frequent back ups? Justify your answer.
d) Is Anti Virus a system utility? Why is the Anti Virus not embedded in the operating system when the latter is installed
Q. What are two dreadful problems that designers should solve to implement a network-transparent system? Answer: One such issue is making all the processors as well as storag
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
Explain how the os implements virtual memory phenomenon.
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
How is a process chosen for being swapped either in or out? Swap out: a. If the process is idle. b. If process has been in main memory for a long time.
Define entry section and exit section. The critical section problem is to design a protocol that the processes can use to cooperate. Every process must request permission to e
Why is it not possible to enforce memory protection at compile time? Every process should be protected against unwanted interference by other process, whether intentional or
What are privileged instructions? Some of the machine instructions that may cause harm to a system are designated as privileged instructions. The hardware permits the privilege
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
Fault tolerance : Machine failures, Communication faults, storage device crashes, and decays of storage media must be tolerated by the system to some extent. A fault tolerant sy
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