In a multiprogramming and time-sharing environment, several user share the system simultaneously. This situation can result in various security problems. (a) What are two such problems? (b) Can we...

In a multiprogramming and time-sharing environment, several user share the system

simultaneously. This situation can result in various security problems. (a) What are two such

problems? (b) Can we ensure the same degree of security in a time-shared machine as we have in