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Q. Some untimely computers protected the operating system by placing it in a memory partition that couldn't be modified by either the user job or the operating system itself. Explain two difficulties that you think could arise with such a scheme.
Answer: The data necessary by the operating system (access controls, passwords, accounting information, and so on) would have to be stored in or passed through unprotected memory and thus be accessible to unauthorized users.
Q. Describes responsibilities of the I/O manager? Answer: The I/O manager is responsible for file systems and device drivers and network drivers. The I/O manager keeps follow
This exercise uses a graph-plotting program ( gnuplot ) to convert tabular data into an image. This is a technique that is very widely used to visualize scientific data; with app
Suppose a logical address space is 1KB, and the page-size is 16 bytes. Assume no page is in the main memory for this process initially and the pure demand paging is used. Current f
Find the optimal solution and optimal value of the following linear program. Use both (a) the enumerating the corner points method and (b) the iso-profit line method. Also identify
what is ROM bios device driver
Mention some attractive properties of semaphore? The Semaphores aren't provided by hardware. However they have numerous attractive properties: Machine indep
How can a user program disturb the normal operation of the system? a) Issuing illegal I/O operation. b) By accessing memory locations within the OS itself. c) Refusing to
Briefly explain the process management in UNIX. UNIX makes use of the easy but powerful process facility that is visible to the user. UNIX follows the model in which the majori
using the transformation process model and system thinking concepts explain the key operation of TGL works.
What are kernels and what do kernels do? The kernel is a program that comprises the central core of a computer operating system. It has entire control over everything that
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