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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.
What are the types of security features employed in client server kinds of network? Security features employed in Client-Server types of network are as illustrated below: a)
Q. Show Packing and Unpacking Data? Packing and Unpacking Data pvm_packs - Pack active message buffer with arrays of prescribed data type: int info = pvm_pac
Determine the salient features of a parallel programmable interface, 8255. 24 I/O lines in 3 8-bit port groups - A, B, C A, B can be 8-bit input or output ports C
Q. What basic concepts of evolution are used by the genetic algorithm? ANSWER: The three concepts are selection, crossover and mutation. Selection is the feature of a genetic a
Design a circuit which computes the square of a number? This should not make use of any multiplier circuits. This should use Multiplexers and some other logic as: 1^2=0+1=1
The search-based tools initially identify the problem and after that appropriately give advice on how to correct it. AT Expert from Cray Research is one of the tools being used
Write Hit Policies: Write through o Update next level on every write o Cache is always clean o A lots of traffic to next level (mostly write) Write
explain the various types of computer systems
can i get a prepared ppt for this topic to present it in a seminar??
Define USB. The Universal Serial Bus(USB) is an industry standard developed to give two speed of operation known as low-speed and full-speed. They provide simple, low cost and
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