Atable cell contains how many pieces of data

One

Explanation: A table is simply rows and columns of data. The point where a row and column intersect is called a cell. A cell contains one piece of data, which can be in the form of text or graphics. For example, The Formatted Table shown contains three rows and four columns. The first row of the table contains titles. Formatting has been applied to help distinguish the titles from the data, and shading has been used to make it easier to read across a row of data. PF...

answer; insolated i/o uses separate memory space,and on the other hand memory mapped i/o uses memory from the main