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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.
The method for updating the main memory as soon as a word is removed from the Cache is known as (A) Write-through (B) write-back (C) protected write
Design a BCD to seven segment decoder that accepts a decimal digit in BCS and generates the appropriate output for segments in display indicator. Ans: BCD-TO-seven-Segment
One of these objectives is related to costs. By going e-commerce, consumers will be able to submit their purchase requests to the sellers without paying a visit to their place. Thi
a. Activity diagram: Activity diagram is used for functional modelling. Captures the process flow. b. Sequence diagram : Sequence diagram is used for dynamic modeling.
Accessing the Operands: operands are usually place in one of two places: -registers (32 int, 32 fp) -memory (232locations) registers are -simple to spe
State the advantages Off-the-shelf - tends to be less expensive as development costs can be spread over many users - can be more sophisticated as large sales bring in c
Q. Illustrate Programming Based on Message Passing? Since we know programming model based on message passing employs high level programming languages such as C/C++ along with a
Extranet : Extranet is Extension of an Intranet that makes the latter accessible to outside companies or individuals with or without an intranet. It is also described as a coll
Two properties of recursion are:- 1. A smallest, base case that is processed without recursion and acts as decision criterion for stopping the method of computation and 2.
Explain Open source software? Open Source Software is software for which the underlying programming code is available to the users so that they might be read it, make changes t
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