Podcast
Questions and Answers
What is the main benefit of inheritance in object-oriented programming?
What is the main benefit of inheritance in object-oriented programming?
- Polymorphism
- Encapsulation
- Abstraction
- Reusability (correct)
What is a subclass in Java?
What is a subclass in Java?
- Any class above a specific class in the class hierarchy
- A class that can only inherit from one superclass
- A class that cannot override methods
- Any class below a specific class in the class hierarchy (correct)
How do you create a final class in Java?
How do you create a final class in Java?
- Using the 'abstract' keyword
- Using the 'static' keyword
- Using the 'final' keyword (correct)
- Using the 'extends' keyword
What does the 'extends' keyword do in Java?
What does the 'extends' keyword do in Java?
What happens when a subclass overrides a method of its superclass?
What happens when a subclass overrides a method of its superclass?
Why is it beneficial to override methods of superclasses in Java?
Why is it beneficial to override methods of superclasses in Java?
What is the purpose of using 'extends' in the code snippet public class Student extends Person?
What is the purpose of using 'extends' in the code snippet public class Student extends Person?
When a Student object is instantiated, what is the sequence of constructor execution based on the given code?
When a Student object is instantiated, what is the sequence of constructor execution based on the given code?
What is the output of the program when the code snippet public static void main( String[] args ){ Student anna = new Student(); } is executed?
What is the output of the program when the code snippet public static void main( String[] args ){ Student anna = new Student(); } is executed?
What does the 'super' keyword do in a subclass constructor?
What does the 'super' keyword do in a subclass constructor?
In which constructor definition can the super() call be used?
In which constructor definition can the super() call be used?
What happens if the super() call does not occur as the first statement in a subclass constructor?
What happens if the super() call does not occur as the first statement in a subclass constructor?
What does using 'super( "SomeName", "SomeAddress" );' do in the code snippet public Student(){ super( "SomeName", "SomeAddress" ); System.out.println("Inside Student:Constructor"); }?
What does using 'super( "SomeName", "SomeAddress" );' do in the code snippet public Student(){ super( "SomeName", "SomeAddress" ); System.out.println("Inside Student:Constructor"); }?
'This implies that the this() construct and the super() calls CANNOT BOTH OCCUR IN THE SAME CONSTRUCTOR.' What is the purpose of this rule?
'This implies that the this() construct and the super() calls CANNOT BOTH OCCUR IN THE SAME CONSTRUCTOR.' What is the purpose of this rule?
'A super constructor call in the constructor of a subclass will result in the execution of relevant constructor from the superclass, based on the arguments passed.' What concept does this statement explain?
'A super constructor call in the constructor of a subclass will result in the execution of relevant constructor from the superclass, based on the arguments passed.' What concept does this statement explain?
'Since a student is also a person, we decide to just extend the class Person'. Which concept does this statement illustrate?
'Since a student is also a person, we decide to just extend the class Person'. Which concept does this statement illustrate?
