Not tied to each other or the existence of department. For example, A Department has many employees so we can say Department Object has collection of employee objects and lifetime of employees So Aggregation is referred to as a 'has a relationship' between objects but it does not imply ownership. The concept of Aggregation is a type of another relationship in which one object is composed of other objects but the lifetimes of If you are familiar with C# you can visit OOPs Concept to see examples. Now you can override the base class method 'MonthEndTasks' to create specific behavior in these different abstractions. Implement different tasks at the end of month. Polymorphism allows you to implement different inherited properties or methods in different ways across abstractions.įor example, you have different abstractions like SavingAccount, CurrentAccount etc which are inherited from base class 'BankAccount' and these abstractions Inheritance is referred to as a ' is a relationship'. For example, the SavingAccount classĬan inherit the members from the BankAccount base class. Reused, modified or extended is called base class and the class which inherits those members is called child class. It allows you to create new classes that modify, extend and reuse the behavior defined in other classes. Inheritance is one of the primary concepts of Inheritance provides the ability to create new abstractions based on existing abstraction. For example, the BankAccount class may contain many private things. Members of the class whichĪre not intended to be used outside of this class can be hidden to limit potential for coding errors. Encapsulation provides the ability for a class to specify how accessible each of its members to the code outside of this class. It allows access through a public set of properties For example, A BankAccount class can provide the abstraction for bank account concept- means It can include all relevant attributes and interaction toĬreate a bank account and Now you can define classes to create any type of bank account like SavingBankAccount which inherits from BankAccount class.Įncapsulation allows to hide internal state and functionality of objects. Object-Oriented Programming is the implementation of a solution based on design.Ībstraction models the relevant attributes and interaction of an entity in the form of classes to define an Abstract representation.Object-Oriented Design mainly focuses on the strategy, how are you going to implement it?. Object-Oriented Analysis explains about the problem you are trying to solve and gives the answers of questions about the problem.Three terms are inter-related as to understand the problem, design the solution and build it or in simple terms analysis, design and programming. When you see the word 'object-oriented', there are other terms such as object-oriented programming, object-oriented design and object-oriented analysis. What do you understand from object oriented analysis, design and programming? For example, A BankAccount entity can be organized by a class 'BankAccount'.Īn entity has certain behavior, The code implements this behavior in the form of operations or functions using Methods and Properties.Īn Object is a block of memory that has been configured and allocated according to the entity - which exists in the form of class.ģ. A Class contains the code that representsĪ specific entity and defines what an entity can do. Object Oriented programming systems organize or manage the code by creating types in the form of classes. OOPs or Object Oriented Programming systems have a certain set of principles or concepts to write good programming logic. These questions are common for any object oriented programming language like Java, C#, PHP, Python etc. You must know the answers of these frequently asked OOPS interview questions to clearĪ developer interview. These interview questions are targeted for OOPs Object Oriented Programming system. These basic, advanced and latest OOPs questions will help you to clear your next Job interview. All answers for these OOPs questions are explained in a simple and easiest way. Here is a List of essential OOPs Interview Questions and Answers for Freshers and mid level of Experienced Professionals. Top 14 OOPs Interview Questions and Answers
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