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....
It’s a great design question and asked a lot in java interviews. This post provides all the differences between abstract class and interface. When should we use interface over the abstract class and vice versa? The post also explains how to use abstract class and interface to create a flexi...
<mappernamespace="com.example.mapper.AnswerMapper">
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...
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 whileHashtableis thread-safe collection. SeeHashtable vs HashMap in Javafor more differences between HashMap and Hashtable in...
This section contains some questions and answers about the use of Java expressions in the test data table of the test suite editor. Question: Why is there a null value for a variable used in a Java expression? Answer: The variable is not being initialized in the request message because it...
Note that for the purposes of this question, neither reflection nor bytecode manipulation may be used to modify another class.Answers1.2.3.4.5.The correct answers are 4 and 5.Explanation Immutability is tricky in Java. To achieve it, you must: Not expose any mutators (setters) Protect ...
publicclassExamGraderTest{publicstaticvoidmain(String[]args){ExamGraderexamGrader=newExamGrader();List<Question>questions=newArrayList<>();questions.add(newQuestion(1,"What is 2 + 2?",5,QuestionType.MULTIPLE_CHOICE));List<Answer>answers=newArrayList<>();answers.add(newAnswer(1,"4"));intscore...
2 Answers + 2 @Nitin Tiwari I don't understand your explanation! What does the network's speed have to do with the right / wrong answer, since I got the answer? maybe I wasn't clear enough: In a java challenge, one question was "What is the output of this code?" with 3 options...
What is Question Answering? 其他人机问答系统介绍 1、OpenEphyra(Java开源) Ephyra is a modular and extensible framework for open domain question answering (QA). The system retrieves accurate answers to natural language questions from the Web and other sources. OpenEphyra主页 2、Watsonsim(Java开源)...