![]() So, when it comes to design a whole system using Object-oriented analysis and design like implementing a vending machine in Java, sometimes they fail to choose the correct data structure and devising simple algorithms.īefore going for a programming/coding interview, It's absolutely necessary to do as much practice in data structure and algorithm as possible to take advantage of all the knowledge available. Yes, there are some exceptions but many Java programmer doesn't focus enough on data structure and hand-coding, which is really important to improve your problem-solving skills for the interview. Since Java programmer gets a linked list implementation in the form of the, they never bother to do this exercise by hand. ![]() Indeed, this is one of the confusing algorithms to understand and it's not easy to grasp, especially if you haven't practiced linked list based questions like finding middle node of linked list in one pass or inserting and removing an element from the linked list data structure. Many Java programmers struggle to reverse a linked list using both recursion and iteration, which makes this question very useful for filtering programmers who can code and who are not so good with coding. Despite being so common, It's not easy to solve this problem on the fly. ![]() This means, you just can't afford to prepare this one, before going for any programming interview. As I had pointed out in the earlier post about the linked list, that reversing a linked list is one of the most popular linked list-based data structure interview question. There are a couple of algorithms exists to reverse a singly linked list in Java, like you can use the three-pointers approach or solve this problem using a Stack, or simply using Recursion without the external stack. It may seem easy to reverse a linked list but when you go around doing the actual task, it's not that easy, especially for first-timers. This is one of the class coding problems from Programming job interviews.
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