VdL Java Inheritance Flashcard

Front

What keyword is used to inherit a class in Java?

Back

extends

Front

In Java, which keyword is used to refer to the parent class of a class?

Back

super

Front

Which of the following is true about the superclass and subclass relationship in Java? A subclass cannot access the private members of its superclass. A subclass inherits all the methods and data from its superclass, including private instance variables. A subclass must override all the methods from its superclass. A superclass can inherit from a subclass.

Back

A subclass cannot access the private members of its superclass.

Front

What is method overriding in Java?

Back

Providing a specific implementation of a method that is already provided by its superclass.

Front

Which of the following is a correct way to call a superclass method from a subclass in Java? Options: super.methodName();, this.methodName();, superclass.methodName();, methodName();

Back

super.methodName();

Front

Which of the following statements is true about constructors and inheritance in Java? A subclass inherits all the constructors of its superclass. A subclass must override all the constructors of its superclass. Only parameterless constructors are inherited.

Back

Constructors are not inherited.

Front

What is the output of the following code snippet if `class B extends A` and only class A has a method `display()` that prints "A"?
java B obj = new B();
obj.display();

Back

A

Front

What is the output of the following code snippet if `class B extends A` and both classes have a method `display()` that prints "A" in class A and "B" in class B? java B obj = new B(); obj.display();

Back

B

Front

What will be printed when the following code runs?
java B obj = new B();
obj.display();
`class B extends A` and both classes have a method `display()` that prints "A" in class A and "B" in class B. The method `display()` of class B also includes the command `super.display()`?

Back

BA

Front

Which principle of Object-Oriented Programming is demonstrated by method overriding?

Back

Polymorphism