Kernel mode and user mode function, Operating System

Assignment Help:

Q. How does the distinction among kernel mode and user mode function as a rudimentary form of protection (security) system?

Answer: The distinction among kernel mode and user mode provides a rudimentary form of protection in the following manner. Certain instructions could be executed merely when the CPU is in kernel mode. Likewise hardware devices could be accessed only when the program is executing in kernel mode. Control over when disrupt could be enabled or disabled is also possible only when the CPU is in kernel mode. Therefore the CPU has very limited capability when executing in user mode thereby enforcing protection of critical resources.


Related Discussions:- Kernel mode and user mode function

Assignment, i need the job to be done within 3 days

i need the job to be done within 3 days

Operation research, scattered resposibi;ity and authority -necessity of ope...

scattered resposibi;ity and authority -necessity of operation research

Hj, scheduling

scheduling

Explain about input - output system management, Q. Explain about Input - Ou...

Q. Explain about Input - Output System Management? I/O System Management The module which keeps track of the status of devices is known as I/O traffic controller. Every

Os structures, #question.explain varios types of system calls..

#question.explain varios types of system calls..

Explain optimal page replacement, Optimal page replacement An optimal ...

Optimal page replacement An optimal page replacement algorithm has the least page fault rate of all algorithms. The algorithm states that a 'replace the page that will not be

Virtual memory, In modern operating systems, applications do not directly a...

In modern operating systems, applications do not directly access the physical memory. Instead, they use so-called virtual memory, where each virtual address is translated to a phys

What is real time system, What is real time system? A real time system ...

What is real time system? A real time system has well explained, fixed time constraints. Processing must be done within the explained constraints, or the system will fail. It i

Dynamically linked segmentation system, Sharing segments between processes ...

Sharing segments between processes without requiring the same segment number is possible in a dynamically linked segmentation system. a. Define a system that permits sta

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd