You use the logical ____ operator to reverse the meaning of a Boolean expression.

Suppose that the operations of the BLOB object are separated into two categories – public operations that are available to all users and protected operations that are available only to certain named users. State all of the problems involved in ensuring that only the named users can use a protected operation. Supposing that access to a protected operation provides information that should not be revealed to all users, what further problems arise?

What will be an ideal response?

Discuss a situation in which it would be more appropriate to use a do…while statement than a while statement. Explain why.

What will be an ideal response?