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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
List disadvantages of using a single directory. Users have no privacy. Users must be careful in choosing file names, to avoid names used by others. Users may destroy each othe
EXAMPLE FOR SEGMENTATION Consider an instance as given in the table and we have five segments numbered from 0 through 4 the segment is stock in the physical memory as shown. Th
Define the Main reason to encrypt a file Major reason to encrypt a file is secure it for transmission.
Central to implementation of a modern memory management system is the page replacement algorithm. Modern virtual memory systems break memory up into pages and map (via a page table
What is real time system? A real time system has well explained, fixed time constraints. Processing must be done within the explained constraints, or the system will fail. It i
What is Directory? The device directory or simply called as directory records information-such as name, location, size, and type for all files on that certain partition. The d
Determine a scheduling policy that is most suitable for a time-shared operating system Round-Robin is a scheduling policy that is most suitable for a time-shared operating s
How is it different from the unbounded buffer algorithm ? Explain.
What are the characteristics of SRS? i. Correct - The SRS should be made up to date when appropriate requirements are identified. ii. Unambiguous - When the requirements are
Additional Reference bits algorithm Here we keep an 8-bit byte for every page in memory. At standard intervals the reference bit is shifted by the OS. If a shift register conta
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