Which of the Following Statements About Interfaces Is True

question 69

Multiple Choice

Which of the following statements about interfaces is true?

• A) You can define an interface variable that refers to an object of any class in the same package.
• B) You cannot define a variable whose type is an interface.
• C) You can instantiate an object from an interface class.
• D) You can define an interface variable that refers to an object only if the object belongs to a class that implements the interface.

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Definitions:

Price Level

A comprehensive average of prices for all goods and services within the economic output.

Inflation

The surge in the overall pricing structure for goods and services, undermining the efficiency of spending.

Goods and Services

The outputs produced by the economy, where goods are tangible objects and services are intangible offerings that satisfy consumer needs or wants.

Real GDP

The measure of a country's economic output adjusted for price changes (inflation or deflation), reflecting the true value of goods and services produced over a specific period.