Security is one of the most important aspects of a modern web application, be it a Java web application, .NET or writing using any other web technology. In the Java world, Spring Security rule the security space. It's one of the rare frameworks which provided many security features e.g. authentication, authorization, session management, remember me and several other useful features out-of-the-box. Since there was no competition to Spring security and it does its job very well, it soon becomes the de-facto standard for implementing security in both Java web applications, REST APIs and core Java applications. The rise of the Spring framework certainly helps it to cement its place as well.
Top 50 Java Generics and Collection Interview Questions
Java Collection and Generic are a very important topic for Java Interviews. They also present some of the hardest questions to a programmer when it comes to interviews, especially Generics. It's not easy to first understand what a particular piece of code doing with those question mark and other signs and then the pressure of interviews also makes it hard to answer complex usage of Generics. But, with proper preparation and paying attention to both Java Collection and Generic, you can solve that hurdle. If you are looking for Java job but hasn't done well in the interviews you have given so far then you have come to the right place. In this blog, I have shared a lot of Java interview questions on various topics and difficulty levels.
How to declare and Initialize two dimensional Array in Java with Example
An array of more than one dimension is known as a multi-dimensional array. Two of the most common examples of multi-dimensional arrays are two and three-dimensional array, known as 2D and 3D array, anything above is rare. I have never seen 4-dimensional arrays, even 3D arrays are not that common. Now the question comes when do use a multi-dimensional array? Any real-life example? Well, 2D arrays are very common on platform games like Super Mario Bros to represent screen or terrain; 2D arrays can also be used to represent structures like a spreadsheet, or to draw board games like Chess, which requires 8x8 board, Checkers and Tic-Tac-Toe, which requires 3 rows and 3 columns.
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