Operating System MCQs

A. Ensure all objects are protected individually
B. Objects have different priority and thus different levels of protection
C. Ensure that each object is accessed correctly and only by allowed processes
D. None of the mentioned

A. Less privileges provide difficulty in executing admin tasks
B. Users can get temporary high privilege access
C. Users should be given just enough privileges to perform their tasks
D. None of the mentioned

A. Prevent mischievous violation
B. Prevent and intentional
C. Ensure that each program component uses resources allotted to it only
D. All of the mentioned

A. Immediate/delayed
B. Selective/general
C. Partial/total
D. Crucial

A. They are too many
B. They are not defined precicely
C. They are distributed throughout the system
D. None of the mentioned

A. When a process capability is revoked then it won’t be able to reacquire it
B. Pointers are maintained for each object which can be used to revoke
C. Indirect pointing is done to revoke object’s capabilities
D. Master key can be used compare and revoke.

A. List of pointers is maintained with each object
B. When revocation is required these pointers are followed
C. This scheme is not adopted in multics system
D. These point to all capabilities associated with that object

A. Capabilities point indirectly to the objects
B. Each capability will not have a unique entry in global
C. Table entries cannot be reused for other capabilities
D. This system was adopted in multics system

A. Create [keyname] [bits]
B. Set-key
C. Key
D. Make [key name]

A. It consists of known access rights and interpreted by the system
B. A user can of protection system can declare other rights
C. Hydra system is not flexible
D. Hydra doesn’t provide rights amplification