![]() Hint - same as HashMap, using hashing and equals() and hashCode() method. Hint - TreeSet is one example of a sorted Collection Hint - use set when you don’t need duplicates, use List when you need order with duplicates, and use Map when you need to store key-value pair.ĥ) Which Sorted Collection have you used? ( answer) ![]() Hint: Collection, List, Set, Map, ArrayList, Vector, LinkedList, HashMap, etcĤ) When do you use Set, List, and Map in Java? ( answer) Hint: Java feature to ensure type safety at compile time.ģ) Which are your favorites classes from Java Collection Framework? ( answer) Here is the diagram which answers this question: Instead of writing answers here, I have linked them to relevant posts so that you can try to solve the problem by yourself here and if you need you can get an in-depth discussion on individual posts to learn the topic in depth.ġ) What is the Java Collection Framework and How do you choose different collections? ( answer) If you have done some work in Java +then you should know the answer to these questions but if you don’t you can always see the answer. Without wasting any more of your time, here is my list of 50+ Java interview questions on Collection and Generics. It’s also the most up-to-date course and covers every new feature introduced in new Java releases 50+ Java Collection and Generic Interview Questions It will help you immensely by filling gaps in your knowledge and going back and forth. Knowing the answers to these questions will not only help you to crack your Java interview but also understand Java Generics and Collection topic in-depth, which will eventually help you to write better Java programmers and code.ītw, if you are new to Java or want to solidify your Java knowledge then you should check out a comprehensive course like The Complete Java Masterclass before attempting to solve these questions. ![]() I am sure you might have also seen it in your interviews. This list has a collection of questions which has both easy and tough questions in it but the most important thing is that most of the questions have already been asked on interviews. It’s useful for both beginners having 2 to 3 years of experience as well as experienced Java programmers with 5 to 6 years of experience. These are the questions you have often seen on a telephonic round of Java interview as well as on face-to-face interviews. In this article, I am going to share some of the frequently asked Java Collection and Generic questions from Interviews. They are theoretical questions based upon Java programming concepts as well as coding and data structure algorithms questions for programmers, and this article is only going to make that collection even more valuable. There are Java questions for beginners as well as expert programmers. In this article, I have shared a lot of Java interview questions on various topics and difficulty levels. If you are looking for Java job but haven’t done well in the interviews you have given so far then you have come to the right place. It’s not easy to first understand what a particular piece of code doing with those question marks and other signs and then the pressure of interviews also makes it hard to answer complex usage of Generics.īut, with proper preparation and paying attention to both Java Collection and Generic, you can solve that hurdle. They also present some of the hardest questions to a programmer when it comes to interviews, especially Generics. ![]() Hello guys, Java Collection and Generic are a very important topic for Java Interviews.
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