Answer:
All of the above
Explanation:
An interrupt priority scheme is a system which decides the priority at which various work is done and it perform all of the above mention task so therefore all of the above is the right answer.
As we change password when
1. we forgot the previous password.
2. when the previous password is leaked due to some reasons.
In case 1 we can change the password to the same as well with no change the problem will be solved but for case 2 at least one or for more safety all characters should be changed.
