Java has a way of officially hiding details of a class definition. To hide details, you mark them as _________.

Until relatively recently all hard drives for personal computers featured sectors that were ______ bytes long

What will be an ideal response?

Find a pair of items, a and b, such that the rules {a} ?? {b} and {b} ?? {a} have the same confidence.

Consider the market basket transactions shown in Table 6.2.