Can a superclass object reference a subclass object?

First approach (Referencing using Superclass reference): A reference variable of a superclass can be used to a refer any subclass object derived from that superclass. If the methods are present in SuperClass, but overridden by SubClass, it will be the overridden method that will be executed.

Can a subclass create a superclass object?

If you create object of subclass, that does not mean it create object of super class. Its just a call to constructor of super class, just to ensure that all the required fields are initialized in super class, but this does not create object of super class.

What happens when a sub class object is assigned to a super class object reference explain with a suitable example?

Assigning subclass object to a superclass variable Therefore, if you assign an object of the subclass to the reference variable of the superclass then the subclass object is converted into the type of superclass and this process is termed as widening (in terms of references).

Can superclass reference variable can hold an object subclass?

Yes, the super class reference variable can hold the sub class object actually, it is widening in case of objects (Conversion of lower datatype to a higher datatype).

Is superclass instance of subclass?

When one class inherits from another class in Java, the two classes take on certain roles. The class that extends (inherits from another class) is the subclass and the class that is being extended (the class being inherited from) is the superclass . In other words, the subclass extends the superclass.

Can you convert a superclass reference into a subclass reference?

Can you convert a superclass reference into a subclass reference? Yes. We can always convert ( Cast ) a superclass reference into a subclass reference.

What is a limitation of assigning a subclass to a superclass reference?

In your example, the Subclass is a special Superclass . It inherits all behavior from the super class and can override behavior to make it different or add new behavior. It’s not allowed because subclasses generally define additional behavior.

When super type reference refer to sub type object is considered as?

Polymorphism is the ability of an object to take on many forms. Polymorphism in OOP occurs when a super type references a sub type object.

Is the superclass to all Java classes either user defined or built in?

15) ___ is the superclass to all Java classes either user-defined or built-in. Explanation: Object is the superclass to all Java classes.

What happens when an object is passed by reference MCQS?

Explanation: The location of the object, that is, the exact memory location is passed, when the object is passed by reference. The pass by reference is actually a reference to the object that the function uses with another name to the same memory location as the original object uses.

Which is known as a generic class?

Explanation: Template classes are known to be generic classes because those can be used for any data type value and the same class can be used for all the variables of different data types.