Answer:You should do this test to check if a property has already been set (in the constructor) at the point you wish to call getX(). In this case you must test the constructor, and not the getX() method. This
This core Java question is followup of previous question and expecting candidate to write Java singleton using double checked locking. Remember to use volatile variable to make Singleton thread-safe. check 10 Interview questions on Singleton Pattern in Java for more details and questions answers 12....
Intermediate Java interview questions and answers 1. What is the difference between the creation of a string using new() and that of literal?Hide Answer A new object is created when using new() whereas using literal, the object already existing might return with the same name. 2. What is ...
Most of the time, we use finally block just to close the resources and sometimes we forget to close them and get runtime exceptions when the resources are exhausted. These exceptions are hard to debug and we might need to look into each place where we are using that type of resource to ...
However, the order of questions and answers is randomized for each applicant.2. How should I interpret the exam scores?First of all, you need to keep in mind one very important thing:The purpose of this Java online test is not to help you find the best developers. Its purpose is to ...
Here’s an updated list of top Java interview questions and answers that’ll help you in Java interviews. Top Java Interview Questions and Answers – Set 1 1) Define class in Java? In Java, a class is a template used to create objects and define their data type of them. It acts as ...
You don’t need to be a Java expert to find the best Java programmers for your company – just use the resources we provide and interview with confidence!So here are the questions and answers:[Question #1 – Player/Weapon – OOP design] [Question #2 – Polyline – OOP design] [Question...
will allow the code to compile and run without error? Select 2 correct answers: A. b = m; B. m = b; C. d = i; D. b1 = i; 解析:A 从子类型到父类型的转换是扩展引用转换,不需要在运行时采取特殊的动作,不会在运行时抛出异常。
Here are 10 of the most common and important Java garbage collection interview questions that any technicalDevOps engineer or developerapplicant must be ready to answer. 1. Why is garbage collection necessary in Java? In many programming languages, such asC and C++,when an object is no longer ...
This post comes directly from my 14+ years of Java programming and lots of interviewing experience. Java 16 has been released recently and I have updated the post to include some of the questions from the latest releases. Core Java Interview Questions and Answers ...