Apache provides an HttpClient library using which we can send get and post requests to a server. Another method for http requests is provided by the Standard HttpUrlConnection API provided java but in this article we will use the Apache HttpClient library for GET and POST requests.
Many enterprises are creating mobile applications for their internal staff, for their customers, or both. These applications need access to data, business rules, and business processes. For architectural and security reasons these applications are typically built to access remotes services that provide the data and functionality that are required by the users.
This is one of the basic question asked in interviews or in gatherings of professionals.
So here we go,
Main method is static in java because
This is just a convention. In fact, even the name main(), and the arguments passed in are purely convention.
Deadlocks in Java is one of the tough categories in which interview questions are asked about multithreading, asked more at a senior level and with lots of follow up questions, though question looks very basic but most of developer get stuck once you start going deep.
The question might start with “What is deadlock ?”
An Object relational mapping (ORM), as shown from the name, is used to map the objects to a relational database. Now, to clarify, by relational database we mean a database with relations(tables) and mapping an object means doing the necessary configuration so that we can automatically save the object as a whole(in the db).
If you haven’t read the Cup Size story, this one won’t make sense. Or it will make sense, but you’ll think its really stupid. Or you won’t think it’s stupid but you’ll find yourself… never mind, just go read it now and then come back.
Whenever we write a servlet, we inherit our class from HttpServlet which contains two service methods. Let’s have a look at the difference between both.
This article assumes that you have a basic knowledge of method overriding and overloading.
This is one of the mostly asked question in job interviews or other professional gatherings.
Most of the candidates are able to tell the difference but they get stuck in the second part, WHEN TO USE WHICH ?