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

Multiprogramming, what are the main advantages of multiprogramming

what are the main advantages of multiprogramming

Kernel mode and user mode function, Q. How does the distinction among kerne...

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 m

Computer organisation, basic advantage of using interrupt initiated data tr...

basic advantage of using interrupt initiated data transfer over transfer under program control without an interrupt

Explain lru page replacement, LRU page replacement In slightest recentl...

LRU page replacement In slightest recently used page replacement algorithm we will replace that page that hasn't been used for the longest period of time. This is similar as an

Explain how the system can deal with the starvation problem, Q. Can a syste...

Q. Can a system detect that some of its processes are starving? If you answer "yes," explain how it can. If you answer "no," explain how the system can deal with the starvation pro

Lock revenue variable, Demonstrate that your program (include the program o...

Demonstrate that your program (include the program output as part of the final report) can produce the correct output with the following parameters. For each case comment if the ou

Define file permission in unix, The permission function is used to calculat...

The permission function is used to calculate what, if any access each class or level of user has to each file on a Unix machine. The permission task is one of the data components s

What is single-level directory, What is Single-level Directory All file...

What is Single-level Directory All files are constrained in the similar directory, which is simple to support and understood. One limitation is when the number of files enhance

What is an operating system and its type, What is an operating system and w...

What is an operating system and what are the different types of operating systems? Operating System An Operating System or OS is a software program that allows the compute

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