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#Java oops interview questions for 10 years experience full
#Java oops interview questions for 10 years experience software

We hope that this article serves as an excellent last-minute revision for your following OOPs interview.

#Java oops interview questions for 10 years experience full

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#Java oops interview questions for 10 years experience software

Get access and complete hands-on experience on a plethora of software development skills in our unique Job Guarantee bootcamp. What is the access modifier for methods inside an interface?Īll the methods inside an interface are public by default, and no other modifier can be specified. At the same time, the superclass is the immediate parent class from which the other class inherits. The base class is the root class- the most generalized class. What is the difference between a base class and a superclass?

Problems need to be thought in term of objectsĩ.

List down the limitations of Object-Oriented programming. The functions that help achieve runtime polymorphism are a part of functions present in the parent class and overridden by a subclass.

Requires jumping between different classes.

Tight coupling of parent and child class.

Are there any limitations of inheritance? If yes, then what? At the same time, encapsulation refers to hiding data as well as the method together. How is encapsulation different from data abstraction?ĭata abstraction refers to the ability to hide unwanted information. Name three operators that can’t be overloaded.ĥ. It is redefined in the subclass as it does not contain any definition in the base class.

What is an abstract function?Īn abstract function is a function declared only in the base class. However, it is not possible to instantiate a structure or inherit from it. How is a structure different from a class?Ī structure is a user-defined collection of variables having different data types. Inheritance allows subclasses to inherit common attributes of a vehicle and define specific attributes and methods to their own. However, child classes are a more specific type of class such as truck, bus, car, etc. The parent class is a logical concept, such as a vehicle is a base class that defines the common properties shared by all vehicles. Explain the concept of inheritance with a real-life example. Next up, we will cover some advanced OOPsinterview questions! 1. It is used as a pointer that differentiates between the global object and the current object by referring to the current one. To refer to the current object of a class, this keyword is used. This is an example of data abstraction as the implementation details are concealed from the driver. However, you do not know precisely how it happens. While driving a car, you know that on pressing the accelerator, the speed will increase.

One of the key OOPs interview questions could be to give a real-life example of data abstraction. It is possible to call the base class without instantiation if it’s a static method and some other subclass has inherited the base class.ĩ. How can you call a base class method without creating an instance? The features like function default arguments, overloading, and templates in C++ support compile-time polymorphism. When a polymorphic call is made, and the compiler knows which function is to be called this is known as compile-time polymorphism. It invokes the overridden method that allows access to these methods and the superclass’s hidden members. The super keyword keyword is used to forward a constructor’s call to a constructor in the superclass. Define protected access modifier.Ī protected access modifier is accessible by own class and accessible by derived class but not accessible by the world. Whereas, Overriding is an OOPs concept that allows sub-classes to have a specific implementation of a method already provided by its parent class. Overloading is two or more methods having the same name but different parameters. What is the difference between overloading and overriding? Protected and private members in C++ are examples. The notion of data hiding is referred to as encapsulation.