Consider the code:
class A { A() { System.out.println("A"); } }
class B extends A { B() { super(); System.out.println("B"); } }
What will be printed when 'new B()' is executed?
Q.142Easy
Which access modifier allows a member to be accessed only within the same class?
Q.143Medium
What will happen if you try to override a final method in a child class?
Q.144Medium
Which statement about 'this' keyword is correct?
Q.145Medium
Consider:
interface I1 { void method(); }
interface I2 { void method(); }
class C implements I1, I2 { public void method() { System.out.println("Method"); } }
What will be the behavior?
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Q.146Medium
What is method overloading?
Q.147Medium
Which of the following is true about abstract classes?
Q.148Easy
Which concept best describes the relationship between Parent and Child classes in 'class Child extends Parent'?
Q.149Hard
What is the output of this code?
class A { int x = 10; }
class B extends A { int x = 20; }
public class Test { public static void main(String[] args) { A a = new B(); System.out.println(a.x); } }
Q.150Hard
In Java, can you create an object of an abstract class?
Q.151Medium
Consider the code:
abstract class Animal { abstract void sound(); void sleep() { System.out.println("Zzz"); } }
class Dog extends Animal { void sound() { System.out.println("Bark"); } }
What can Dog objects do?
Q.152Hard
What is the main difference between method overriding and method overloading?
Q.153Easy
Which of the following correctly describes encapsulation?
Q.154Medium
Which statement is true about the default access modifier (package-private) in Java?
Q.155Easy
What happens when you try to instantiate an interface in Java?
Q.156Easy
Which keyword is used to achieve runtime polymorphism in Java?
Q.157Medium
What is the output of the following code?
class Parent { void show() { System.out.println("Parent"); } }
class Child extends Parent { void show() { System.out.println("Child"); } }
public class Test { public static void main(String[] args) { Parent p = new Child(); p.show(); } }
Q.158Easy
Can a class extend multiple classes in Java?
Q.159Medium
Which of the following statements about the 'final' keyword is correct?
Q.160Medium
What is the difference between 'this' and 'super' keywords?
