![]() if you use the reference variable of type subclass then the new method will be called, but if you use the reference variable of superclass then the old method will be called.ĩ. But, Yes, you can declare the same static method in a subclass, which will result in method hiding i.e. Instead, static methods belong to a class and are resolved at compile time using the type of reference variable. No, you cannot override a static method because it's not bounded to an object. Can we override the static method in Java? ( answer) Simply changing the return type of two methods will not result in overloading, instead, the compiler will throw an error.Ĩ. either the number of arguments or the type of arguments. One of the most important rules of method overloading in Java is that the method signature should be different i.e. What are the rules of method overloading and overriding in Java? ( answer) See the answer for a more detailed explanation.ĥ. Also, primitive variables are not objects in Java. there are many things you can do without objects e.g. Java is not a pure object-oriented programming language e.g. Is Java a pure object-oriented language? if not why? ( answer) a call to the method in the subclass will call the static method declared in that class and a call to the same method is superclass is resolved to the static method declared in the super-class.Ĥ. When you declare two static methods with the same name and signature in both superclass and subclass then they hide each other i.e. What is the method of hiding in Java? (answer) ![]() See the answer for a more detailed discussion.ģ. A call to such a method is resolved at runtime depending upon the actual object and not the type o variable. In order for method overriding, we need Inheritance and Polymorphism, as we need a method with the same signature in both superclass and subclass. It's one of the magic of object-oriented programming where the method is chosen based upon an object at runtime. What is the method overriding in OOP or Java? ( answer) () is overloaded as we have a 6 or 7 println() method each accepting a different type of parameter.Ģ. When we have multiple methods with the same name but different functionality then it's called method overloading. It's one of the oldest OOPS concept questions, I have seen it 10 years ago and still see it now. What is method overloading in OOP or Java? ( answer) If you are a fresher and junior Java developer with 2 to 3 years of experience then you must revise these questions, learn if you don't know to do well on your Java Job interviews.ġ. If you are a senior Java developer then you already know the answers to this question and I suggest you practice more on object-oriented analysis and design skills i.e. ![]() ![]() They are mostly asked at first a few rounds like on screening round or on the telephonic round. In this article, I am going to share with you some OOPS concept-based Java interview questions that I have collected from friends and colleagues and they have seen in various Java interviews on different companies. These questions are more difficult and require not only a true understanding of OOP fundamentals but also about SOLID design principles and patterns.ģ0 OOPS Interview Questions in Java with Answers If you look for Java interview questions for 2 to 4 years experienced programmer, you will find lots of questions based upon OOP fundamentals like Inheritance and Encapsulation but as you gain more experience, you will see questions based on object-oriented analysis and design like designing and coding a vending machine or implement a coffeemaker in Java. ![]() It makes sense as well, as these are the programmers who must know the OOP basics like Abstraction, Inheritance, Composition, Class, Object, Interface, Encapsulation, etc. ![]()
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