On a form, the text box and its label would be considered two different controls

A(n) ________ is a formula used to calculate new fields from the values in existing fields

A) argument B) expression C) parameter D) macro

Consider a pair of processes X and Y that use the communication service B from Exercise 2.14 to communicate with one another. Suppose that X is a client and Y a server and that an invocation consists of a request message from X to Y (that carries out the request) followed by a reply message from Y to X. Describe the classes of failure that may be exhibited by an invocation.

What will be an ideal response?