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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.
Write an ALP to count positve and numbers from array.
Paging supervisor: This part of the operating system built and manages the page tables. If the due to dynamic address translation hardware a page fault occurs exception then
Q. Describe types of complements? There are two kinds of complements for a number of base (also known as radix) r. These are known as r's complement and (r- 1)'s complement. Fo
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design a sequential circuit that continuously computes the function 2X + 3 or 3X + 1 where the variable X is a three-bit unsigned integer available on a serial interface. A special
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Q. Need of the assembly language ? Machine language code comprises the 0-1 combinations which computer decodes directly. Though the machine language has the following problems
zero, one, two three address instructions
WLS8 handles JMX but it uses weblogic execution of JMX server. It does not supports generalise sun javax API which can be used with any JVM. There are some patches available which
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