The Collection API is a set of classes and interfaces that support operation on collections of objects. These classes and interfaces are more flexible, more powerful, and more regular than the vectors, arrays,
On the other hand, a problem is deemed to have an optimal substructure if the optimal solution to the given problem can be constructed from optimal solutions of its subproblems. Programming technical interview questions 21. Explain how hash tables work Hashmaps, also known as hashtables, represe...
Now learn about designing a good key forHashMap. This question is an excellent way to test if you correctly understood HashMap’s internal working. This will help you in answering questions like – WhyStringis a good key for HashMap? How you will design a class to be used as key? Will...
This Java collection interview questions is I guess most popular one. Most of Java programmer who has at least 2 years of experience has seen this question on core Java or J2EE interview. Well there are many difference between them but most important isthread-safety,HashMapis not thread-safe ...
14. How Hashmap Works? This question is themost importantand is most likely to be asked at every job interview level. You must be very clear on this topic., not only because it is the most asked question but also it will open up your mind to further questions related to Collection API...
1.int hash 2.K key 3.V value 4.Node next It can be seen that node is containing a reference of its own object. So it’s a linked list. HashMap: array Node: node_hash_map Performance of HashMap depends on 2 parameters: 1.Initial Capacity 2.Load Factor As already said, Capacity ...
Sr.No.Question 1 What are new Java8 Features? 2 Difference between GET & POST METHODS? 3 Difference between forward() method & SendRedirect() method? 4 Difference between HashMap and HashTable? 5 Difference between HashSet and TreeSet? 6 What is meant by Collections in Java? 7 What is ...
[Question #4 – The Bank – Multithreading]You are given a class which implements a Bank as a singleton:public class Bank { // Singleton implementation omitted for brevity's sake // map from account number to balance private Map<String, Integer> accounts = new HashMap<>(); public int ...
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adjacency map Familiarize yourself with each representation and its pros & cons BFS and DFS - know their computational complexity, their trade offs, and how to implement them in real code When asked a question, look for a graph-based solution first, then move on if none MIT(videos): Breadth...