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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.
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Write 8086 initialisation routine required to program 8255 for mode 1 with Port A and Port B as output Ports and Port C as an input port. Indicate all the relevant signals.
Q. What is Collective Message Passing? In collective message passing all the processes of a group take part in communication. MPI offers a number of functions to apply the coll
Consider a collection class that is similar to the ArrayList class, except that elements are sorted in a certain order. We will call this class SortedArrayList. This c
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Whenever we compile with -g option, it will make a symbol table, and according that table for every function and line it will call ptrace.
In order to suppress the leading zeroes of a number field the which keywords is used ? NO-ZERO.
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