Specifies more than one background on a single HTML element.

A pair of (partial) database operations, p and q, are said to forward-commute if, in every database state in which both p and q are defined, the sequences p, q and q, p are both defined and, in both sequences, p and q return the same values and the final database state is the same.

a. Describe howforward commutativity can be used in the design of a deferred-update pessimistic concurrency control. b. Give a conflict table for such a control for the account object described in Figure 20.18.

You do not need to specify the highest array subscript in the ____ statement.

A. Do...Loop B. For...Next C. For Each...Next D. While...Wend