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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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Problem 1 a) Give three reasons why connecting peripherals directly to the system bus are not a good practice. b) Name five categories in which the major functions on requ
What are the Advantages of carrying out simulations - saves cost (instead of doing the real thing) - Safer (scenarios tried out on the simulation first before used in real
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How can i made Carnot engine
The most common type of non-volatile memory is the ROM device. This device is read only and the data is masked into the chip during manufacture. Variations of the ROM are one off p
We can also use the logical operators to numbers directly and perform simple bit manipulation . The operators are & Bitwise AND | Bitwise OR ^ Bitwise exclusiv
The goal of hashing is to produce a search that takes O(1) time
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