Explain the possible interpretations of a null value
What will be an ideal response?
The problem with allowing null values in a table is that the null value is open to three different interpretations. First, a null value in a field may mean that no value is appropriate for the field for the given record. Second, a null value may mean that the value of that field is known to be blank for the given record. Third, a null value may mean that the value of that field is not known for the given record.
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When wanting to show trends over time, what type of visual aid would be most effective?
A) Pie chart B) Table C) Bar chart D) Line chart E) Surface chart
In a(n) ________ structure, there are many small sellers, each having similar products, and each unable to have a significant impact on the quality, price, or supply of a product
A) monopoly B) oligopoly C) monopolistic competition D) perfect competition E) natural competition