Explain the protection problems, Operating System

Assignment Help:

Q. In some systems a subdirectory is able to be read and written by an authorized user just as ordinary files can be.

a. Explain the protection problems that could arise.

b. Suggest a scheme for dealing with every of the protection problems you named in part a.

Answer:

a. One piece of information reserved in a directory entry is file location. If a user could alter this location then he could access other files defeating the access-protection scheme.

b. Don't allow the user to directly write onto the subdirectory. Rather offer system operations to do so.


Related Discussions:- Explain the protection problems

What are the steps followed in testing, What are the steps followed in test...

What are the steps followed in testing? i. Unit testing - The individual components are tested in this type of testing. ii. Module testing - Related collection of independen

Estimate the balking rate, People arrive at a barber shop at the rate of on...

People arrive at a barber shop at the rate of one every 4.5 minutes. If the shop is full (it can hold five people altogether), 30% of the potential customers leave and come back i

Explain hashed page table method, Hashed page table method A general ap...

Hashed page table method A general approach for managing address spaces larger than 32 bits is to use a hashed page table with the hash values being the virtual-page number.

What is an idle thread, idle thread The special thread a dispatcher wi...

idle thread The special thread a dispatcher will run when no ready thread is found. The primary purpose of the idle process and its threads is to remove what would otherwise b

Explain kernel-level threads (klt), KERNEL-LEVEL THREADS (KLT) In this...

KERNEL-LEVEL THREADS (KLT) In this level every thread management is done by kernel .No thread library except an API system calls to the kernel thread facility exists. The kern

Define segmentation, Define Segmentation  The memory allocation method...

Define Segmentation  The memory allocation method subject to “external” fragmentation is Segmentation.

List antivirus techniques used for protection purposes, Question: a) Th...

Question: a) There are main goals of data security. List them and elaborate on how they provide protection. b) Describe threats associated with data security. c) Describe

What is page fault?, What is page fault? In the computer storage techno...

What is page fault? In the computer storage technology a page fault is an exception which is raised by the memory management unit when a requested page isn't mapped in physical

Write a short note on the linux file systems, Question: (a) Red Hat Li...

Question: (a) Red Hat Linux is distributed under the Open Source agreement. Explain what you understand by Open Source distribution system. (b) Write a short note on the L

Compute the effective instruction time on the system, Q. An operating syst...

Q. An operating system sustains a paged virtual memory using a central processor with a cycle time of 1 microsecond. It costs an additional one microsecond to access a page other

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