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1.Which of the following class definitions defines a legal abstract class?a. class A { abstract void unfinished() { } }b. class A { abstract void unfinished(); }c. abstract class A { abstract void unfinished(); }d. public class abstract A { abstract void unfinished(); }

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Limosa

Answer:(c) abstract class A { abstract void unfinished(); }

Explanation:

A legal abstract class must have the keyword abstract before the class and an abstract class has abstract functions with the keyword abstract written and a void as the return type.

Lanuel

The syntax for class definitions which defines a legal abstract class is: a. class A { abstract void unfinished() { } }.

What is a class?

A class can be defined as a user-defined blueprint (prototype) or template that is typically used by programmers to create objects and define the data types, categories, and methods that should be associated with these objects.

In object-oriented programming (OOP) language, a class that implements an interface would also implement all of that interface's method declarations.

In conclusion, an abstract class can be represented by using this syntax for class definitions:

class A { abstract void unfinished() { } }.

Read more on class here: brainly.com/question/20264183

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