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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.
its language base assignment
Q. Explain Arithmetic Data Processing Instructions? These instructions carry outlogical and arithmetic operations on data. Arithmetic: The four fundamental operations are
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
Define clock rate? The clock rate is given by, R=1/P, where P is the length of single clock cycle.
The combination of an IP address and a port number is known as a socket.
Explain Lexical substitution during macro expansion ? Lexical substitution is used to produce an assembly statement from a model statement. Model statements have 3 kinds of str
Determine the Ad hoc testing - It is a type of testing which is performed without the use of planning or/and documentation. - These tests are run only one time unless a defe
Define word length? Every group of n bits is referred to as a word of information and n is known as the word length.
Fuzzy logic is a form of various-valued logic; it deals with reasoning that is approximate rather than fixed & exact. In contrast with traditional logic theory, where binary sets h
system area
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