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Which of the following statements about defining an Apex Class are true?

1) Apex Classes can be defined with the keyword 'class'.
2) Apex Classes can be declared as public or private.
3) Apex Classes can inherit from another Apex Class.
4) Apex Classes can implement interfaces.
5) Apex Classes can contain variables, methods, and inner classes.

Answer :

Final answer:

Every statement given about defining an Apex Class is accurate. They can be defined with the keyword 'class,' declared as public or private, inherit from another Apex class, implement interfaces, and contain variables, methods, and inner classes.

Explanation:

All the statements provided about defining an Apex Class are true. An Apex Class can indeed be defined with the keyword 'class.' Similarly, it can be declared as public or private, indicating the access level of the class. This is very common in object-oriented programming languages.

Furthermore, an Apex Class can indeed inherit from another Apex Class, following the principle of inheritance in object-oriented programming. This means that one class can acquire the properties and methods of another class.

An Apex Class can also implement interfaces, allowing for the use of multiple inheritance in the code. Lastly, an Apex Class can contain variables, methods, and inner classes, which all serve to encapsulate the data and behavior of the class.

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