Which of the Following Statements About a Class Is Correct

question 62

Multiple Choice

Which of the following statements about a class is correct?

• A) A class should not have private instance variables.
• B) Private instance variables are the interface to the class.
• C) Private instance variables hide the implementation of a class from the class user.
• D) Private instance variables should rarely be used in classes.

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Definitions:

Phototransistor

A semiconductor device that detects light and converts it into an electrical signal, used in various sensing and light detection applications.

Strain Gauge

A sensor whose resistance varies with applied force; it's used in mechanical engineering to measure strain on an object.

Resistance

A measure of the opposition to the flow of electric current in a conductor, usually quantified in Ohms (Ω).

Reed Switch

An electromagnetic switch used to control the flow of electricity in a circuit, operated by an applied magnetic field.