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Implementing Protection with Virtual Memory - computer architecture:
To enable the operating system to implement protection in the VM system, the HW have to:
I. Support at least 2 modes that denoted whether the running process is a user process (executive process) or an operating system process (kernel/supervisor process).
II. Provide a part ion of the CPU state that a user process may read but not write (includes supervisor mode bit).
o Only operating system process may change page tables. Page tables are held in operating system address space thereby preventing a user procedure from changing them.
o When processes desire to share information in a restricted way, the OS have to assist them.
o The write access bit (in both the TLB and the page table) can be used to limit the sharing to only read sharing.
In 1993 High Performance FORTRAN Forum which is a group of academicians and many leading software and hardware vendors in field of parallel processing established an informal langu
Explain about the term Intranet in brief. Intranet: An Intranet is a form of information system which facilitates communication into the organizations in between widely
1+1
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An operating system contains 3 user processes each requiring 2 units of resource R. The minimum number of units of R such that no deadlocks will ever arise is? Ans. The minimum
write a programme to simulate a train station to automate
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