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6 165
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6 165
Correct the error in the following Java code snippet that attempts to override a method in a subclass.
class SuperClass {
protected void display() {
System.out.println("SuperClass display");
}
}
class SubClass extends SuperClass {
private void display() {
System.out.println("SubClass display");
}
}
6 165
Correct the error in the following Java code snippet that defines a method to calculate the sum of two integers.
public int sum(int a, int b) {
return a + b
}
6 165
What will be the output of the following Java program that demonstrates the concept of inheritance?
class Animal {
String sound() { return "Some sound"; }
}
class Dog extends Animal {
String sound() { return "Bark"; }
}
public class TestInheritance {
public static void main(String[] args) {
Animal myDog = new Dog();
System.out.println(myDog.sound());
}
}
6 165
In Java, which keyword is used to inherit properties and methods from another class?
6 165
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6 165
What will be the output of the following Java code snippet demonstrating the use of abstract classes?
abstract class Shape {
abstract void draw();
}
class Rectangle extends Shape {
void draw() {
System.out.println("Drawing Rectangle");
}
}
public class Test {
public static void main(String[] args) {
Shape shape = new Rectangle();
shape.draw();
}
}
6 165
Which of these is the correct way to define a constructor that takes a string and an integer as arguments in a class named `Person` in Java?
6 165
What is the output of the following Java code snippet demonstrating the use of a for-each loop?
int[] numbers = {1, 2, 3, 4, 5};
for(int num : numbers) {
System.out.print(num + " ");
}
6 165
Fix the error in the following Java code snippet to correctly calculate the factorial of a number using recursion.
public int factorial(int n) {
if (n == 1)
return 1;
else
return n * factorial(n - 1);
}
6 165
What is the output of the following Java code snippet?
String name = "Java";
System.out.println(name instanceof String);
6 165
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6 165
What will be the output of the following Java code snippet that demonstrates the use of the 'instanceof' keyword?
class Parent {}
class Child extends Parent {}
public class Test {
public static void main(String[] args) {
Parent obj = new Child();
System.out.println(obj instanceof Child);
}
}
