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

Briefly discuss on bankers algorithm, Briefly discuss on Bankers algorithm?...

Briefly discuss on Bankers algorithm? The resource-allocation graph algorithm is not applicable to a resource-allocation system with multiple examples  for each resource type.

Deadlock prevention-resource allocation graph allocation, Explain Deadlock ...

Explain Deadlock Prevention-Resource allocation graph allocation Resource allocation graph algorithm :  Using this algorithm we are able to actually know if there exists in th

How many cubic feet of storage space would require, Q. Presume that we agr...

Q. Presume that we agree that 1 kilobyte is 1,024 bytes 1 megabyte is 1,0242 bytes and 1 gigabyte is 1,0243 bytes. This progression carries on through terabytes, petabytes, and ex

Define lru page replacement policy, Define ‘LRU’ page replacement policy ...

Define ‘LRU’ page replacement policy LRU is Least Recently Used page replacement policy.

What is the use of FIFOs in client-server applications, What is the use of ...

What is the use of FIFOs in client-server applications

Define the properties of interactive operating system, Define the propertie...

Define the properties of Interactive operating system Interactive:- This system is composed of many short transactions where the results of the next transaction may be unpred

Batch system, what is a batch system give me answer in simple words so that...

what is a batch system give me answer in simple words so that i can understand

Write a linux script to add name in class list, For this exercise I wanted ...

For this exercise I wanted to give you some real-world examples of useful bash scripts. Therefore, you will write a couple of scripts that I actually use in my teaching to automate

Benefits and drawbacks of batch system, Q. Benefits and Drawbacks of Batch ...

Q. Benefits and Drawbacks of Batch System? Benefits of Batch System: Move much of the work of operator to computer. Increased performance as it was possible for j

Banker''s algorithm, Consider the following snapshot of a system, answer th...

Consider the following snapshot of a system, answer the following questions using the banker's algorithm: 1. What is the content of the matrix Need? Is the system in a safe stat

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