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Unit II Polymorphism Lesson #4: Polymorphism Explained

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Unit II Polymorphism Lesson #4: Polymorphism Explained

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Questions and Answers

What term refers to the behavior where objects in different classes can behave differently when sent the same messages?

Inheritance

Encapsulation

Polymorphism (correct)

Abstraction

In robot programming, why is it recommended to keep each class simple and define robots that perform one task effectively?

To avoid naming tasks performed by the robots

To complicate the program structure

To ensure each class focuses on performing a specific task efficiently (correct)

To define robots that can perform multiple unrelated tasks

What is the benefit of having robot teams cooperate in tasks instead of using individual robots?

Reduced complexity in the program

Limited usage of polymorphism

Increased task efficiency (correct)

Elimination of null references

How does polymorphism relate to robot behavior in different classes?

It allows robots in different classes to behave differently (C) Signup and view all the answers

Why is it important for each robot class to be able to name the overall task or service it provides?

To clarify the purpose and functionality of the robot class (C) Signup and view all the answers

What problem-solving method involves having multiple robots cooperate in performing a task?

Robot teamwork (C) Signup and view all the answers

What is a key concept mentioned in the text regarding robot references?

Assigning a single name to multiple robots (C) Signup and view all the answers

How many robots are involved in the task described in the text?

Three (B) Signup and view all the answers

What does the term 'Polymorphism' refer to in the context of the text?

Allowing objects of different classes to be treated as objects of a common superclass (D) Signup and view all the answers

In the context of robot programming, what does it mean to assign a value to a reference?

Linking a reference to a specific robot object (D) Signup and view all the answers

What is the purpose of using 'null' in declaring robot references?

To refer to non-existent robots (C) Signup and view all the answers