No doubt that Data structure and algorithms are an integral part of any Programming job interview, including Java, C++ or any other programming language. In fact Data structure and algorithms are quite a favorite one and all top notch companies including Google, Microsoft, Amazon and investment banks like Goldman Sachs, Citigroup, Barclays, Morgan Stanley or J.P. Morgan focus extensively on data structure and algorithms, while hiring both senior and mid-level developers in Java, C++, and C# positions. When I shared some traditional, popular, and more frequently asked questions on Data structure and Algorithms in my earlier article, I received a lot of feedback to share some practical, scenario-based questions on data structure e.g. which kind of data structure will you use in a particular scenario and why.
Stack and Queue are two of important data structures in the programming world and have a variety of usage. As opposed to the array and linked list, which are considered as a primary data structure, they are a secondary data structure which can build using an array or linked list. You can use Stack to solve recursive problems and Queue can be used for ordered processing. The difference between Stack and Queue Data structure is also one of the common questions not only in Java interviews but also on C, C++, and other programming job interviews. Well, main difference comes the way these data structures are used, Stack is LIFO (last In First Out) data structure, which means the item which is inserted last is retrieved first, similar to a stack of plates in a dinner party, where every guest pick up the plate from the top of stack.
Every trade has their tools, and Java programming is no exception. In fact, good knowledge of tools and mastery of using them, saves a lot of time in design, development, testing, debugging, and troubleshooting any production issue. In order to become a good developer, you must know right tools for right jobs. A developer without tools and tricks are like a toothless lion, hence it's very important that you devote some time on learning tools required for your day to day job. Many developers think that learning an IDE like Eclipse, NetBeans or IntelliJ is enough, but that's just the start of the process. No doubt that IDEs are the most important tool ever created for programmers but they are not the solution for everything.