What is inheritance in Java?
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Java Programming · all questionsInheritence
Inheritence
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In Java, which keyword is used to implement inheritance between classes?
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What is a superclass in Java?
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In Java, can a subclass inherit constructors from its superclass?
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What is method overriding in Java?
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In Java, can a subclass override a private method from its superclass?
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What is the "super" keyword used for in Java?
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What is the result of the following code snippet?
class Parent {
void display() {
System.out.println("Parent");
}
}
class Child extends Parent {
void display() {
System.out.println("Child");
}
}
public class Main {
public static void main(String[] args) {
Parent obj = new Child();
obj.display();
}
}Select an option to see the answer and solution.
In Java, can a subclass access private members (fields and methods) of its superclass?
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What is the difference between "extends" and "implements" in Java?
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In Java, can a subclass access protected members (fields and methods) of its superclass?
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What is the result of the following code snippet?
class Parent {
protected void display() {
System.out.println("Parent");
}
}
class Child extends Parent {
void show() {
display();
}
}
public class Main {
public static void main(String[] args) {
Child obj = new Child();
obj.show();
}
}Select an option to see the answer and solution.
In Java, can a subclass have more than one superclass?
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What is the purpose of the "final" keyword in Java inheritance?
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In Java, can a subclass inherit private constructors from its superclass?
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What is the concept of method overriding in Java inheritance?
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In Java, can a subclass inherit static methods from its superclass?
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What is the result of the following code snippet?
class Parent {
void display() {
System.out.println("Parent");
}
}
class Child extends Parent {
void display() {
super.display();
System.out.println("Child");
}
}
public class Main {
public static void main(String[] args) {
Child obj = new Child();
obj.display();
}
}Select an option to see the answer and solution.
In Java, can a subclass access package-private members (fields and methods) of its superclass defined in another package?
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What is the result of the following code snippet?
class Parent {
int x = 10;
}
class Child extends Parent {
int x = 20;
void display() {
System.out.println(super.x + " " + x);
}
}
public class Main {
public static void main(String[] args) {
Child obj = new Child();
obj.display();
}
}Select an option to see the answer and solution.