PyQdeck LogoPyQdeckSubjects
Back to the 2022 paper

Module 6: File Management

20227m

The open-file table is used to maintain information about files that are currently open. Should the operating system maintain a separate table for each user or just maintain one table that contains references to files that are currently being accessed by all users? If the same file is being accessed by two different programs or users, should there be separate entries in the open-file table?

Search GoogleAsk AI

Similar questions

Database Management SystemIt is better to use files than a DBMS when there are (i) stringent real-time requirements (ii) multiple users wish to access the data (iii) complex relationships among data (iv) All of the above20202mDATABASE MANAGEMENT SYSTEMIllustrate the database characteristics, How they are different from File systems.20247mDatabase Management SystemCompare the traditional file-based systems and relational database management system approaches.20197mDatabase Management SystemDiscuss the advantages and disadvantages of using DBMS as compared to a conventional file system.20227m
PreviousConsider a demand-paging system with a paging disk that has an average access and transfer time of 20 milli-seconds. Addresses are translated through a page table in main memory, with an access time of 1 microsecond per memory access. Thus, each memory reference through the page table takes two accesses. To improve this time, we have added an associative memory that reduces access time to one memory reference if the page-table entry is in the associative memory. Assume that 80 percent of the accesses are in the associative memory and that of those remaining, 10 percent (or 2 percent of the total) cause page faults. What is the effective memory access time?