Operating System MCQs

1019 MCQs  (Page 89 of 102)

Access matrix model for user authentication contains _____________
A. A list of objects
B. A list of domains
C. A function which returns an object’s type
D. All of the mentioned
For a domain _______ is a list of objects together with the operation allowed on these objects.
A. Capability list
B. Access list
C. Both capability and access list
D. None of the mentioned
Which one of the following is capability based protection system?
A. Hydra
B. Cambridge cap system
C. Both hydra and cambridge cap system
D. None of the mentioned
In UNIX, domain switch is accomplished via _____________
A. File system
B. User
C. Superuser
D. None of the mentioned
In domain structure what is Access-right equal to?
A. Access-right = object-name, rights-set
B. Access-right = read-name, write-set
C. Access-right = read-name, execute-set
D. Access-right = object-name, execute-set
What is meaning of right-set?
A. It is a subset consist of read and write
B. It is a subset of all valid operations that can be performed on the object
C. It is a subset consist of read, write and execute
D. None of the mentioned
What is Domain?
A. Domain = set of all objects
B. It is a collection of protection policies
C. Domain= set of access-rights
D. None of the mentioned
What does the access matrix represent?
A. Rows-domains, columns-objects
B. Rows-objects, columns-domains
C. Rows-access list, columns-domains
D. Rows-domains, columns-access list