Skip to content
MCQtimes.com
GK
Pakistan Studies
Current Affairs
Islamic Studies
English
MCQtimes.com
Toggle Menu
OS Protection
Home
/
Computer Science
/
Operating System
/
OS Protection
- Page 2
Show/Hide Answers
OS Protection
Which is an unsolvable problem in access-matrix?
Owner override
Brute force
Access denied
Confinement
Author:
rikazzz
Comment
OS Protection
The protection domain of a process contains _____________
object name
rights-set
both object name and rights-set
none of the mentioned
Author:
rikazzz
Comment
OS Protection
What does the access matrix represent?
Rows-Domains, Columns-Objects
Rows-Objects, Columns-Domains
Rows-Access List, Columns-Domains
Rows-Domains, Columns-Access list
Author:
rikazzz
Comment
OS Protection
How can fence and relocation be used together?
To each program address, the contents of fence register are added
To contents of fence register is subtracted from actual address of program
To each program address, the contents of fence register are not added
None of the mentioned
This both relocates the address and guarantees that no one can access a location lower than a fence address.
Author:
rikazzz
Comment
OS Protection
In UNIX, domain switch is accomplished via _____________
file system
user
superuser
none of the mentioned
Author:
rikazzz
Comment
OS Protection
What is the problem of mutually suspicious subsystem?
Service program can steal users data
Service program can malfunction and retain some rights of data provided by user
Calling program can get access to restricted portion from service program
Calling program gets unrestricted access
Both calling program and service program are vulnerable to access each others private data/rights.
Author:
rikazzz
Comment
OS Protection
What is the main objective of protection?
Ensure all objects are protected individually
Objects have different priority and thus different levels of protection
Ensure that each object is accessed correctly and only by allowed processes
None of the mentioned
Author:
rikazzz
Comment
OS Protection
In domain structure what is Access-right equal to?
Access-right = object-name, rights-set
Access-right = read-name, write-set
Access-right = read-name, execute-set
Access-right = object-name, execute-set
Author:
rikazzz
Comment
OS Protection
What is best solution to have effect of unbounded number if base/bound registers?
Tagged architecture
Segmentation
Fence method
None of the mentioned
Author:
rikazzz
Comment
OS Protection
What is all-or-nothing situation for sharing in memory?
Program makes all its data available to be accessed
It prohibits access to some
It creates rules who can access program memory
It separates program memory and data memory
Author:
rikazzz
Comment
Page navigation
Previous Page
Previous
1
2
3
4
…
6
Next Page
Next
Go to Page
Light
Dark
GK
Pakistan Studies
Current Affairs
Islamic Studies
English