Operating System » Protection Access Matrix
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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

Who can add new rights and remove some rights?

A. Copy
B. Transfer
C. Limited copy
D. Owner

What are the three copyrights?

A. Copy
B. Transfer
C. Limited copy
D. All of the mentioned

Which two rights allow a process to change the entries in a column?

A. Copy and transfer
B. Copy and owner
C. Owner and transfer
D. Deny and copy

Which is an unsolvable problem in access-matrix?

A. Owner override
B. Brute force
C. Access denied
D. Confinement

What is ‘separation’ in security of Operating systems?

A. To have separate login for different users
B. To have separate hard disk drive/partition for different users
C. It means keeping one user’s objects separate from other users
D. None of the mentioned