10 Questions
What is a key constraint on a subclass when overriding a protected method from its superclass?
The subclass can strengthen the accessibility of the method.
Which of the following is a possible outcome when a subclass overrides a method from its superclass?
The subclass must have the same method signature and accessibility.
What happens when a subclass overrides a protected method from its superclass and changes its visibility to public?
The subclass is strengthening the accessibility of the method.
What is the term for when a subclass provides a different implementation of a method that is already defined in its superclass?
Method overriding
What is the main goal of using access modifiers (private, default, protected, public) in object-oriented programming?
To restrict access to certain methods or variables.
What is the primary benefit of specifying a concrete type when creating an ArrayList?
To reduce the risk of ClassCastException
What is the purpose of specifying a concrete type when creating an ArrayList, in terms of type safety?
To enforce type safety at compile time
What is an implication of not specifying a concrete type when creating an ArrayList?
The ArrayList can store objects of any type
What is the effect of assigning the reference of an ArrayList to a variable?
It assigns the reference to the variable
What is the purpose of using generic types in creating an ArrayList?
To reduce the risk of runtime errors
Test your understanding of Java inheritance rules, including method overriding and accessibility. Learn about the rules that govern method accessibility in subclasses and superclasses. Improve your Java programming skills with this quiz.
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