


Explain the relationship between reference variables and polymorphism in Java with examples.
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what is reference variable in java Informational
- How do reference variables work in the context of graphical user interfaces (GUIs) in Java (e.g., Swing, JavaFX)?
- How do reference variables behave in the context of Android development with the Dalvik/ART virtual machine?
- Explain the role of reference variables in implementing data structures like stacks and queues.
- Can you have a reference to a primitive type in Java? Why or why not?
- What is the role of reference variables in inheritance in Java?
- What is the difference between a reference variable and a pointer in languages like C++?
- Be cautious when passing mutable objects as arguments to methods or storing them in collections, as they can be modified externally through other references.
- When you create a Socket or ServerSocket object, you assign it to a reference variable. Why?
- What is the heap memory in Java and how are objects stored there?
- What is the Builder design pattern and how does it utilize reference variables to construct complex objects step by step?
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