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Q. Explain the File-system manipulation?
File-system manipulation there is several details in file allocation, creation, deletion and naming that users should not have to perform. Blocks of disk space are utilized by files and must be tracked.
Deleting a file requires eliminating the name file information and freeing the allocated blocks. Protections must as well be checked to assure proper file access. User programs could neither make sure adherence to protection methods nor be trusted to allocate only free blocks and deallocate blocks on file deletion.
What are the functions of virtual file system (VFS)? a. It separates file-system-generic operations from their execution defining a clean VFS interface. It permits transparent
Relative file organization A relative file is an array of fixed-length slots and the records can be inserted in the first free slot found from the beginning of the file and
Define an assembly language Assembly language stands for a Low level programming language
with the aid of diagrams describe the following OS structure monolithic,layered and client server.
Q. Consider the demand-paged computer system where the level of multiprogramming is currently fixed at four. The system was recently deliberate to determine utilization of CPU and
is there any difference between the trap and interrupt??
How can an index file be used to speed up the access in direct-access files? Have an index in memory; the index gives the key and the disk location of its corresponding record.
Define what can be used as a criterion for classification of data structures utilized in language processing Answer: nature of a data structure, lifetime of a dat
Consider a demand-paging system with the following time-measured utilizations: CPU utilization: 10%, Paging disk: 98%, Other I/O devices: 5%. What does this imply? How to improv
What are two differences among user-level threads and kernel-level threads? Under what circumstances is one type better than the other? (1) User-level threads are unknown by th
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