IF an operating system permits executable objects to be used simultaneously by multiple users
without a refresh of the objects, what security problem is most likely to exist?

A.
Disclosure of residual data.

B.
Unauthorized obtaining of a privileged execution state.

C.
Data leakage through covert channels.

D.
Denial of service through a deadly embrace.

Explanation:
This is a well known issue knew by many programmers, since the operating system
is allowing the executables to be used by many users in different sessions at the same time, and
there is not refreshing every certain time, there will be a disclosure of residual data. To fix this we
need to get sure that objects are refreshed frequently, for added security its better an OS that
does not allow the use of an executable object by many users at the same time.