LeetCode Top Interview Questions 217. Contains Duplicate (Java版; Easy) 题目描述 Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least
第一次做; 这个计算[2,n)上素数的个数的算法叫作埃拉托色尼筛选法(Sieve of Eratosthenes); 算法思想如图 埃拉托色尼筛选法(the Sieve of Eratosthenes)简称埃氏筛法,是古希腊数学家埃拉托色尼(Eratosthenes 274B.C.～194B.C.)提出的一种筛选法。 是针对自然数列中的自然数而实施的,用于求一定...
As a professed Java programmer, there are certain expectations from you during job interviews. Here are the top 10 Java interview questions you should be ready to answer.
Web services are popular these days because they are language and platform independent. It’s easy to create SOAP and REST based web services. This post will help you learn about web services and related interview questions. Then there are questions with detailed answers forJava Web Services. 7...
We’ve brought together a team of highly skilled Java experts to create a set of ready-made Java programming questions you can use in your interview process.These Java interview questions have everything you need for a face-to-face interview with prospective developers: possible right and wrong...
I come, I see, I conquer Java interview questions Describe what happens when an object is created in Java? Several things happen in a particular order to ensure the object is constructed properly: 1. Memory is allocated from heap to hold all instance variables and implementation-specific data ...
a Singleton class. Creating Singleton was tricky prior Java 4 but once Java 5 introduced Enum its very easy. see my article How to create thread-safe Singleton in Java for more details on writing Singleton using enum and double checked locking which is purpose of this Java interview question....
HashMap interview questions and ConcurrentHashMap interview questions. Learn questions like how hashmap works, rehashing in concurrenthashmap and more.
RESTful web services are lightweight, scalable, stateless, and support multiple data formats (JSON, XML). They are easy to integrate with web and mobile applications. 43) What do you mean with CI/CD tools? CI/CD solutions streamline the integration of code updates (Continuous Integration) ...
# Java Collections Framework Questions 1. What is Java Collections framework? What are its advantages? By definition, a Collection isan object that can store a group of objects.Like in set theory, a set is a group of elements. Easy enough !!