Algorithm basic questions1/20/2024 The hiring manager might ask a question like this to ascertain your decision-making skills. Related: Mastering the Interview: Coding Interview Questions 3. The LinkedHasSet should be converted back to an ArrayList, which will then contain all elements with duplicates removed.” The second, and better, way in which you can remove duplicates from an array, is by creating a LinkedHashSet from the original ArrayList, which will automatically remove duplicates as it does not allow the latter. The second ArrayList will contain all elements of the original array minus the duplicate elements. Then you need to traverse the original ArrayList, which contains the duplicate values, and store the first appearance of each element in the new ArrayList using the contains() method. To do so, you need to create a new ArrayList. To successfully answer this Java array question, you should have a foundational knowledge of Java and how to apply constructors, like recursions and loops.Įxample: “I can describe two ways in which you can do this. Since it's a fundamental data structure, you may encounter several different questions related to arrays during the interview process. How would you remove duplicates from a given array in Java?Īn array is a structure most programming languages use to implement other data structures, such as strings, stacks, queues and lists. Related: 9 Common Data Structures Every Programmer Should Know 2. However, it is most useful in database management, analyzing numbers, graphics and compiler design.” Show you will be able to appropriately structure their data by referencing elements specific to the company.Įxample: “Data structures can effectively be applied anywhere data exists. Your answer will demonstrate your understanding of what the interviewing company does. Here are common algorithm and data structure interview questions with explanations and example answers. Get your personalized job feed on Indeed Be the first to see new jobs in your area Algorithm/data structure questions How many queues do you need to execute a priority queue? What is the difference between a “push” and a “pop?” What is the difference between “null” and “void?” Your answers to these general questions will show the interviewer that you understand how data structures work. Related: Top 45 Programming Interview Questions (with Sample Answers) General questions on data structures Will you be able to explain data structures to colleagues unfamiliar with programming? How did your last position prepare you for this role?ĭid your last position involve data structures? These common questions are framed to gain information about your specific knowledge and skills:
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