The Error Message Index or Primary Key Cannot Contain a Null

question 10

Multiple Choice

The error message Index or primary key cannot contain a Null Value. will be generated by attempting which of the following?

• A) A user tries to enter a record in the table Countries that doesn't contain data in the primary key.
• B) A user tries to add a record to a table that is related to the Countries table, and that record contains a foreign key value that does NOT correspond to a primary key value in the Countries table.
• C) A user tries to enter a record in the table Countries with the same primary key as another record.
• D) A user tries to request a joined table using LINQ.

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Definitions:

Current GDP

The market value of all final goods and services produced within a country in a given period, measured without adjusting for inflation.

Inventory

The sum of all goods and materials held by a company in stock, including raw materials, work-in-progress, and finished goods.

Investment Expenditures

Spending on capital goods by firms and households which will be used for future production of goods and services.

GDP Accounting

A method used to calculate the gross domestic product of a country, summing up the total value of all goods and services produced over a specific time period.