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What is an API?

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  WHAT IS AN API ? 🤔 API/Server is an intermediate communicator to our   Physical Device(Computer💻/Mobile📱) and Database(Physical Device). In order to get the Data from Database We need to send the request from Device to Server. Then our requested server Fetch the requested Data from Database and send the requested data as a response to our requested device.   So here, As a API creators we have to decide which data we have to fetch from the database, what data we have to send to the user Device, who can access the data and what is the request format. So We have to decide according to our Requirements. Software engineering is all about Requirements.   Before we start to design APIs we need to clarify above mention things.   Basic understanding of API working Diagram. I created above diagram for a Basic understanding of an API mechanism. To understand above situation. just consider this use case. You want to see your Science Exam marks on your University Websit...
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Android MVVM Architecture in Java

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What is MVVM Architecture MVVM The purpose of this blog is to provide an introduction to the Model-View-ViewModel pattern. this design pattern is introduced by Microsoft because of the WPF Application. To understand the MVVM design pattern you no need to know about the WPF Application. but you want to have some basic knowledge about OOP. 
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