![]() ![]() What is the difference between poll() and remove() method of. How does HashMap work in Java (answer) 2. This is quite an expensive operation and thus, in usecases where frequent insertion and deletion of elements are involved, LinkedList is preferred where it is all about adding or removing the node and re-linking the existing node. Popular Java Collection Interview Questions Answers 1. In case of addition or deletion of element in an ArrayList, there is an operation such as System.arraycopy is involved. What is stack trace in Java and why is it important in exception handling What is a nested try-catch block What is a multi-catch block in Java What are. Which of them is most efficient for adding and removing elements from the list Explain your answer, including any other alternatives you may be aware of. I am sure that you missed the point or mistakenly wrote the point. ArrayList, LinkedList, and Vector are all implementations of the List interface. Thanks for sharing the questions and answers. This is mainly because the worst time complexity of accessing an element/object in an ArrayList is always ā 1ā³ whereas in LinkedList it can be ānā. Describe and compare fail-fast and fail-safe iterators. ![]() On the other hand, one would want to use the LinkedList when there is a greater need for insertion and deletion and not much use of the accessing the element at a particular index. OOPS concepts (Data Abstraction, Encapsulation, Inheritance, Polymorphism) Basic Java constructs like loops and data types String handling Collection. Anyway, without further ado, here is my list of some of the frequently asked Java multithreading and concurrency questions from Java developer. I have only used Stream API functions to solve the below questions. 15 Java Thread Interview Questions and answers. In this tutorial, I will be sharing the top 10 Java 8 coding and programming interview questions and answers. I have already shared the Java 8 Interview questions and answers. Primarily, one would want to use ArrayList in the cases where there is a greater need to access the element rather than insertion or deletion. It has been 6 years since Java 8 was released. Top 50 Java Collections Interview Questions These are frequently asked Java interview questions from the Java Collections framework and you should review them before going for. 4. This is again one of the question where many of the interviewee got confused.
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