Operating System — Test 32

Correct Answer: C. C. Ensure that each object is accessed correctly and only by allowed processes

Correct Answer: C. C. Users should be given just enough privileges to perform their tasks

Correct Answer: D. D. All of the mentioned

Correct Answer: D. D. Crucial

Correct Answer: C. C. They are distributed throughout the system

Correct Answer: A. A. When a process capability is revoked then it won’t be able to reacquire it

Correct Answer: C. C. This scheme is not adopted in multics system
Explanation: In the Back-Pointers scheme for revoking capabilities, a list of pointers is intentionally maintained from each object back to every capability that has been issued for it. This allows the system to follow the pointers and invalidate or change the capabilities when access rights need to be revoked. This specific scheme was adopted in the MULTICS system.

Correct Answer: A. A. Capabilities point indirectly to the objects

Correct Answer: B. B. Set-key

Correct Answer: A. A. It consists of known access rights and interpreted by the system