Light
collapse
Practice Quizzes
AP Computer Science A
Unit 9 – Inheritance in Object-Oriented Programming
Topic 9.5
If the class Bird is a superclass of the class Penguin, what happens when Java tries to run the line “Penguin penguin = new Bird();”?
Java will change the reference variable `penguin` from type Penguin to type Bird and then assign the Bird object successfully to it.
There will be a compile-time error.
The reference variable `penguin` will point to null.
The Bird object will be successfully assigned to the reference variable `penguin` of type Penguin.
Related content
Practice quizzes
Practice this subject
Practice this unit
Practice this topic
Study guides (1)
AP Computer Science A - 9.5 Creating References Using Inheritance Hierarchies
Key terms
Class
Java
Superclass
Bird
Penguin
About Us
About Fiveable
Blog
Careers
Testimonials
Code of Conduct
Terms of Use
Privacy Policy
CCPA Privacy Policy
Resources
Cram Mode
AP Score Calculators
Study Guides
Practice Quizzes
Glossary
Crisis Text Line
Request a Feature
Report an Issue
Stay Connected
© 2024 Fiveable Inc. All rights reserved.
AP® and SAT® are trademarks registered by the College Board, which is not affiliated with, and does not endorse this website.
About Us
About Fiveable
Blog
Careers
Testimonials
Code of Conduct
Terms of Use
Privacy Policy
CCPA Privacy Policy
Resources
Cram Mode
AP Score Calculators
Study Guides
Practice Quizzes
Glossary
Crisis Text Line
Request a Feature
Report an Issue
© 2024 Fiveable Inc. All rights reserved.
AP® and SAT® are trademarks registered by the College Board, which is not affiliated with, and does not endorse this website.
Back
Practice Quiz
Guides
Glossary
Guides
Glossary
Next
