1.
Which of the following statements are correct?
i) Physical separation – in which process use different physical objects like separate printers
ii) Physical separation – in which process having different security requirement at different times
iii) Logical separation – In which users operate under illusion that no other processes exist
iv) Logical separation – In which processes conceal their data and computations
Answer: Option 'B'
i and iii
2.
What is ‘separation’ in security of Operating systems ?
Answer: Option 'C'
It means keeping one user’s objects separate from other users
3.
Which of the following objects require protection ?
Answer: Option 'B'
Printers
4.
Which is an unsolvable problem in access-matrix ?
Answer: Option 'D'
Confinement
5.
Which two rights allow a process to change the entries in a column ?
Answer: Option 'A'
copy and transfer
6.
What are the three copyrights ?
Answer: Option 'D'
all of the mentioned
7.
Who can add new rights and remove some rights ?
Answer: Option 'D'
owner
8.
What are the three additional operations to change the contents of the access-matrix ?
Answer: Option 'D'
all of the mentioned
9.
In domain structure what is Access-right equal to ?
Answer: Option 'A'
Access-right = object-name, rights-set
10.
What is meaning of right-set ?
Answer: Option 'B'
It is a subset of all valid operations that can be performed on the object
11.
What does access matrix represent ?
Answer: Option 'A'
Rows-Domains, Columns-Objects
12.
What is Domain ?
Answer: Option 'C'
Domain= set of access-rights