Top 15 Data Structures and Algorithm Interview Questions for Java programmer - Answers

Data structures and algorithm questions are important part of any programming job interview, be it a Java interview, C++ interview or any other programming language. Since data structures is core programming concept, its mandatory for all programmers, to know basic data structures like stack, linked list, queue, array, tree and graph. Though tree and graph are on tough side, I still see programmers to get familiar will all these. Any list of programming job interview questionsis incomplete without questions from data structures and algorithms. Similarly while going on questions from data structure you may get some programming exercise as well e.g. swapping numbers without temp variable. Linked list and arrays are favorite topics in any data structure interview, questions like reversing linked list, traversing linked list or deleting nodes from linked list, which involves algorithm and data structures are quite common. Similarly, finding duplicates in array, finding missing numbers, sorting arrays are very popular. You can also expect questions from stack, queue, array, linked list, tree, graph and HashMap are most common in any data structure interview. In this tutorial,  we will see couple of data structure questions answers from these topic. Let us know, if you have any interesting questions from data structures and algorithm, which you faced during any Java interviews.

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