5 What is Java exception handling?
In Java, exceptions are objects. When you throw an exception, you throw an object. However, you can’t throw just any object as an exception — only those objects whose classes descend from throwable. Throwable serves as the base class for an entire family of classes, declared in java.lang, that your program can instantiate and throw.
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What are the types of inner classes (non-static nested class) used in java?
wat is final...? wat is finally...? wat is finalize....? difference between " final and finally and finalize "...?
What is a boolean flag in java?
What is java util list?
How many ways can an argument be passed to a subroutine and explain them?
Is java map thread safe?
Describe what happens when an object is created in java ?
What is Map interface?
interface X{ void m1(); void m2(); } class Child2 extends Object implements X { public void m1(){ System.out.println("Child2 M1"); } public void m2(){ System.out.println("Child2 M2"); } } public class ParentChildInfterfaceDemo { public static void main(String[] args){ X x = new Child2(); X x1 = new Child2(); x.m1(); x.m2(); x.equals(x1); } } Will the above code work? If yes? Can you please explain why the code x.equals(x1) will work as the equals method is called on interface reference vaiable?
What is java util hashmap?
In a class implementing an interface, can we change the value of any variable defined in the interface?
What are the four pillars of java?